WHAT MOVES YOUR WORLDWHAT MOVES YOUR WORLD
SERVO VALVES
PILOT-OPERATED
WITH INTEGRATED DIGITAL ELECTRONICS
AND FIELDBUS INTERFACE
SERIES D671 AND D672/SIZES 05 AND 07
OFFERING HIGH PRODUCTIVITY FOR
DEMANDING APPLICATIONS REQUIRING HIGHLY
DYNAMIC RESPONSE, FLEXIBLE INTEGRATION
AND ADVANCED MAINTENANCE
Rev C July 2011
D671 AND D672 SERVO VALVES
2Rev C July 2011
INTRODUCTION Moog D671 and D672 Servo Valves
2
INTRODUCTION
Rev C July 2011
Moog D671 and D672 Servo Valves
Whenever the highest levels of motion control
performance and design flexibility are required, you’ll find
Moog expertise at work. Through collaboration, creativity
and world-class technological solutions, we help you
overcome your toughest engineering obstacles. Enhance
your machine‘s performance. And help take your thinking
further than you ever thought possible.
Introduction
Table of ConTenTs
This catalog is for users with technical knowledge. To ensure all necessary characteristics for function and safety of the system, the user has to check the suitability of the products
described herein. The products described in this document are subject to change without notice. In case of doubt, please contact Moog.
Moog is a registered trademark of Moog Inc. and its subsidiaries. All trademarks as indicated herein are the property of Moog Inc. and its subsidiaries. For the full disclaimer refer to
www.moog.com/literature/disclaimers.
For the most current information, visit www.moog.com/industrial or contact your local Moog office.
INTRODUCTION ..........................................................................3
Product Overview ..............................................................3
Features and Benefits .....................................................4
TECHNICAL DATA .....................................................................5
D671 with ServoJet® Standard Pilot Stage ..........5
D671 with ServoJet® High Flow Pilot Stage ........9
D672 with 2-Stage ServoJet® D670 .........................13
Electronics ............................................................................17
Safety Options ....................................................................22
BACKGROUND ............................................................................23
Description of Operation ...............................................23
Flow calculation ..................................................................25
Digital Electronics .............................................................26
Fieldbus Interface ..............................................................27
Configuration Software ...................................................28
About Moog ..........................................................................29
ORDERING INFORMATION ....................................................31
Accessories and Spare Parts .......................................31
Order Code ...........................................................................34
3Rev C July 2011
INTRODUCTION Moog D671 and D672 Servo Valves
PRODUCT OVERVIEW
3
INTRODUCTION
Rev C July 2011
Moog D671 and D672 Servo Valves
PRODUCT OVERVIEW
The valves have an optional fieldbus interface to operate
and monitor the valves and set parameters. Common
fieldbus technologies like CANopen, Profibus-DP or
EtherCAT are supported by Moog‘s hardware and software.
Other options are available upon request.
D671 and D672 Series Servo Valves offer high
productivity for demanding applications requiring highly
dynamic response, flexible integration and advanced
maintenance.
D671 and D672 Series Servo Valves are used to control
position, velocity, pressure or force. This series has very
good static and dynamic properties and is ideal for high
performance machine applications.
Moog Servo Valves feature a spool sliding in a bushing
offering better accuracy, compared to a spool sliding
within a cast-iron body. The advantages of this design are:
• The highest precision positioning and control due to
expert design and manufacture of the spool lands and
slots
• Customer specific flow characteristics due to the
availability of a tailored design geometry of slots in
the bushing
The D671 Series Servo Valves in size 05 are a 2-stage
design with a ServoJet® Pilot Stage. Two pilot stage
versions with different flows are offered to meet different
dynamic requirements.
• The ServoJet® Standard meets typical requirements
and offers lower leakage flow.
• The ServoJet® High Flow provides higher dynamic
response.
The D672 Series Servo Valves in size 07 are a 3-stage
design with the 2-Stage ServoJet® Pilot Valve D670. The
3-stage design offers the highest dynamic response
and provides a stable spool control even for the most
demanding applications.
This valve series features digital onboard electronics
offering the user high flexibility, and an embedded
microprocessor enabling very fast processing speeds. The
Moog Valve Configuration Software is used to easily tune
the valve performance, change parameters and perform
diagnostics, all through a service connector.
r
w
u
y
e
C
w Demand value
e Control deviation
u Controller output
y Controlled variable
r Feedback variable
C Controller
Control loop consisting of controller and valve-actuated cylinder
with position transducer
D671 with ServoJet®
Standard Pilot Stage
D671 with ServoJet®
High Flow Pilot Stage
D672 with 2-Stage
ServoJet® D670
Valve design 2-stage, with spool and bushing 3-stage, with spool and
bushing
Mounting surface ISO 4401-05-05-0-05 with T1 ISO 4401-07-07-0-05
Size according ISO 4401 05 07
Rated flow at Δp
N
35 bar/spool
land (500 psi/spool land)
20/40/80/90/120/160/180 l/min
(5.3/10.6/21.1/23.8/31.7/42.3/47.6 gpm)
160/240 l/min
(42.3/63.4 gpm)
Maximum flow 250 l/min (66 gpm) 450 l/min (118.9 gpm)
Maximum operating pressure port
P, A, B
350 bar (5,000 psi)
Pilot valve ServoJet® Standard ServoJet® High Flow 2-Stage ServoJet® D670
Step response time for 0 to 100 %
stroke
9 to 19 ms 7 to 14 ms 7 ms
4Rev C July 2011
INTRODUCTION Moog D671 and D672 Servo Valves
FEATURES AND BENEFITS
4
INTRODUCTION
Rev C July 2011
Moog D671 and D672 Servo Valves
FEATURES AND BENEFITS
Features Benefits
Hydraulic Design: This is one of the highest response valves in the Moog family of products.
Best dynamic and static performance with good valve
damping
High productivity
Pilot valve insensitive to contamination even in high
pressure applications up to 350 bar (5,000 psi)
High reliability
Vibration-resistant electronics Robust
Spool and bushing unit is wear-resistant and has no
o-rings
Long service life
Standardized mounting surface as per ISO 4401 Standardization
Spool-bushing design allows adaption to customer
specific applications
Tailored solution
Digital valve electronics: State-of-the-art design for flexible integration and advanced maintenance.
Integrated monitoring functions High reliability
Remote maintenance and setup are possibleQuick tuning Quick tuning
Diagnostic capability by recording the fault history Easy maintenance
Fieldbus capability: Flexible integration and control with fieldbus.
Reduced requirement for cabling due to bus connectors
reducing the need for D/A and A/D conversion by
customer
Cost savings
Direct data transfer from the PLC without D/A conversion Simplified control structure
Data transfer without signal noise due to electrically-
isolated fieldbus interface
High reliability
5Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® STANDARD PILOT STAGE
5
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® STANDARD PILOT STAGE
General technical data
Valve design 2-stage, with spool and bushing
Pilot valve ServoJet® Standard
Mounting surface ISO 4401-05-05-0-05 with T1
Installation position Any
Weight 13.5 kg (29.8 lb)
Storage temperature range -40 to +80 °C (-40 to +176 °F)
Ambient temperature range -20 to +60 °C (-4 to +140 °F)
Vibration resistance (general) 30 g, 3 axis, 10 Hz to 2 kHz
Shock resistance (general) 50 g, 6 directions
Hydraulic data
Operating pressure pilot valve
Minimum pressure 0.3 x system pressure above T or Y, at least 25 bar
(360 psi)
Operating pressure range X port 25 to 350 bar (360 to 5,000 psi)
Maximum pressure Y port 210 bar (3,000 psi)
Maximum operating pressure of main stage
Port P, A, B 350 bar (5,000 psi)
Port T at Y internal 210 bar (3,000 psi)
Port T at Y external 250 bar (3,600 psi)
Rated flow at Δp
N
35 bar/spool land (500 psi/spool land) 20/90 l/min
(5.3/21.1 gpm)
40/80 l/min
(10.6/21.1 gpm)
120/160/180 l/min
(31.7/42.3/47.6 gpm)
Maximum flow 250 l/min (66 gpm)
Main stage leakage flow (rate) (≈ zero lap)
1) see next page
3.0/4.5 l/min
(0.8/1.2 gpm)
3.8 l/min
(1.0 gpm)
4.5 l/min (1.2 gpm)
Pilot flow static
1) see next page
1.7 l/min
Pilot flow for 100 % step
1) see next page
1.7 l/min (0.4 gpm)
Hydraulic fluid Hydraulic oil as per DIN 51524 parts 1 to 3 and ISO 11158.
Other fluids on request.
Temperature range of hydraulic fluid -20 to +80 °C (-4 to +176 °F)
Recommended viscosity range 32 to 68 mm
2
/s (cSt)
Maximum permissible viscosity range 5 to 400 mm
2
/s (cSt)
Recommended cleanliness class as per ISO 4406
For functional safety 19/16/13
For longer service life 17/14/11
Static and dynamic data
Step response time for 0 to 100 % stroke 9 ms 14 ms 19 ms
Threshold < 0.1 % < 0.08 % < 0.05 %
Hysteresis < 0.4 % < 0.3 % < 0.2 %
Null shift at ΔT = 55 K < 2.0 % < 1.5 % < 1.0 %
Sample deviation of rated flow ±10 %
Technical data
6Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® STANDARD PILOT STAGE
6
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® STANDARD PILOT STAGE
Electrical data
Duty cycle 100 %
Degree of protection according to EN 60529 IP65 with mounted mating plugs
Supply voltage
2)
18 to 32 V
DC
Permissible ripple of supply voltage
3)
±3 V
Maximum current consumption static
4)
0.25 A
Maximum current consumption dynamic
4)
0.5 A
Fuse protection, external, per valve 1 A (slow)
EM compatibility Emitted interference as per EN 61000-6-4:2005,
interference immunity as per EN 61000-6-2:2005
1) Measured at 210 bar (3,000 psi) pilot or system pressure, oil
viscosity 32 mm
2
/s and oil temperature 40 °C (104 °F)
2) All connected circuits must be isolated from the mains supply
by „electrical separation“ in accordance with EN 61558-1 and
EN 61558-2-6. Voltages must be limited to the safety extra-low
voltage range in accordance with EN 60204-1. We recommend
the use of SELV/PELV power packs.
Installation drawing
11
(0.43)
6,5
(0.26)
BA
P Y
11,5
(0.45)
18,7
(0.74)
15,7
(0.62)
173
(6.8)
268
(10.6)
36
(1.4)
138
(5.4)
158
(6.2)
80
(3.1)
157
(6.2)
174
(6.9)
75
(3.0)
47
(1.9)
1,3
(0.05)
X
1
1 Filter under cover
3) Frequency from 50 Hz to 10 kHz
4) Measured at ambient temperature 25 °C (77 °F) and supply
voltage 24 V
7Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® STANDARD PILOT STAGE
7
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® STANDARD PILOT STAGE
Step response Frequency response
20/90 l/min (5.3/23.8 gpm)
100
75
0 5 10 15 20 3025
50
25
0
Stroke [%]
Time [ms]
5%
25%
90%
101 100
0
-30
-60
-90
-120
-150
-12
-9
-6
-3
0
3
Amplitude [db]
Phase lag [degree]
Frequency [Hz]
1,000
40/80 l/min (10.6/21.1 gpm)
100
75
0 5 10 15 20 3025
50
25
0
Stroke [%]
Time [ms]
5%
25%
90%
101 100
0
-30
-60
-90
-120
-150
-12
-9
-6
-3
0
3
Amplitude [db]
Phase lag [degree]
Frequency [Hz]
1,000
120/160/ 180 l/min (31.7/42.3/ 47.6 gpm)
100
75
0 5 10 15 20 3025
50
25
0
Stroke [%]
Time [ms]
5%
25%
90%
101 100
0
-30
-60
-90
-120
-150
-12
-9
-6
-3
0
3
Amplitude [db]
Phase lag [degree]
Frequency [Hz]
1,000
8Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® STANDARD PILOT STAGE
8
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® STANDARD PILOT STAGE
Hydraulic symbol
4-way version, alternatively X and Y external
X Y
A B
P T T
1
Typical flow characteristics
Measured with operational pressure of 210 bar
(3,000 psi), oil viscosity 32 mm
2
/s and oil temperature of
40 °C (104 °F).
Flow vs. signal curves at Δp
N
= 35 bar (500 psi) per spool land
0
0 20 40 60 80 100
Q [l/min (gpm)]
Signal [%]
200 (52.8)
180 (47.6)
20 (5.3)
40 (10.6)
60 (15.9)
80 (21.1)
100 (26.4)
120 (31.7)
140 (37.0)
160 (42.3)
Hole pattern of mounting surface
The mounting surface must conform to ISO 4401-05-
05-0-05 with additional T
1
. Observe mounting length of
minimum 100 mm (3.94 in) and O-ring recesses for X and
Y. For 4-way valves with Q > 150 l/min (39.6 gpm) the
second tank port T
1
is required.
For maximum flow the ports for P, T, T
1
, A and B must be
designed with Ø 11.5 mm (0,45 in), not according to the
standard.
Evenness of connecting surface has to be 0.01 mm (0.004
in) over 100 mm (3.94 in), average surface finish R
a
better
than 0.8 µm.
23
(0.91)
64.6
(2.5)
10.6
(0.42)
x
y
100
(3.9)
F
1
F
2
F
4
F
3
P
A
B
T
T
1
X
Y
14.5
(0.57)
11
(0.4)
75
(3.0)
19
(0.75)
19
(0.75)
9.9
(0.39)
Designation P A B T T
1
X Y F
1
F
2
F
3
F
4
Size Ø mm
in
11.5
0.45
11.5
0.45
11.5
0.45
11.5
0.45
11.5
0.45
6.3
0.25
6.3
0.25
M6
M6
M6
M6
M6
M6
M6
M6
Position X mm
in
6.3
0.25
21.4
0.84
21.4
0.84
32.5
1.28
32.5
1.28
11.0
0.43
11.0
0.43
0.0
0
0.0
0
46.0
1.81
46.0
1.81
Position Y mm
in
27.0
1.06
16.7
0.66
37.3
1.47
3.2
0.13
50.8
2
-8.0
-0.31
62.0
2.44
0.0
0
54.0
2.13
54.0
2.13
0.0
0
9Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® HIGH FLOW PILOT STAGE
9
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® HIGH FLOW PILOT STAGE
General technical data
Valve design 2-stage, with spool and bushing
Pilot valve ServoJet® High Flow
Mounting surface ISO 4401-05-05-0-05 with T1
Installation position Any
Weight 13.5 kg (29.8 lb)
Storage temperature range -40 to +80 °C (-40 to +176 °F)
Ambient temperature range -20 to +60 °C (-4 to +140 °F)
Vibration resistance (general) 30 g, 3 axis, 10 Hz to 2 kHz
Shock resistance (general) 50 g, 6 directions
Hydraulic data
Operating pressure pilot valve
Minimum pressure 0.3 x system pressure above T or Y, at least 25 bar
(360 psi)
Operating pressure range X port 25 to 350 bar (360 to 5,000 psi)
Maximum pressure Y port 210 bar (3,000 psi)
Maximum operating pressure of main stage
Port P, A, B 350 bar (5,000 psi)
Port T at Y internal 210 bar (3,000 psi)
Port T at Y external 250 bar (3,600 psi)
Rated flow at Δp
N
35 bar/spool land (500 psi/spool land) 20/90 l/min
(5.3/21.1 gpm)
40/80 l/min
(10.6/21.1 gpm)
120/160/180 l/min
(31.7/42.3/47.6 gpm)
Maximum flow 250 l/min (66 gpm)
Main stage leakage flow (rate) (≈ zero lap)
1) see next page
3.0/4.5 l/min
(0.8/1.2 gpm)
3.8 l/min
(1.0 gpm)
4.5 l/min (1.2 gpm)
Pilot flow static
1) see next page
2.6 l/min
Pilot flow for 100 % step
1) see next page
2.6 l/min (0.7 gpm)
Hydraulic fluid Hydraulic oil as per DIN 51524 parts 1 to 3 and ISO 11158.
Other fluids on request.
Temperature range of hydraulic fluid -20 to +80 °C (-4 to +176 °F)
Recommended viscosity range 32 to 68 mm
2
/s (cSt)
Maximum permissible viscosity range 5 to 400 mm
2
/s (cSt)
Recommended cleanliness class as per ISO 4406
For functional safety 19/16/13
For longer service life 17/14/11
Static and dynamic data
Step response time for 0 to 100 % stroke 7 ms 11 ms 14 ms
Threshold < 0.1 % < 0.08 % < 0.05 %
Hysteresis < 0.4 % < 0.3 % < 0.2 %
Null shift at ΔT = 55 K < 2.0 % < 1.5 % < 1.0 %
Sample deviation of rated flow ±10 %
10Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® HIGH FLOW PILOT STAGE
10
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® HIGH FLOW PILOT STAGE
Electrical data
Duty cycle 100 %
Degree of protection according to EN 60529 IP65 with mounted mating plugs
Supply voltage
2)
18 to 32 V
DC
Permissible ripple of supply voltage
3)
±3 V
Maximum current consumption static
4)
0.25 A
Maximum current consumption dynamic
4)
0.5 A
Fuse protection, external, per valve 1 A (slow)
EM compatibility Emitted interference as per EN 61000-6-4:2005,
interference immunity as per EN 61000-6-2:2005
1) Measured at 210 bar (3,000 psi) pilot or system pressure, oil
viscosity 32 mm
2
/s and oil temperature 40 °C (104 °F)
2) All connected circuits must be isolated from the mains supply
by „electrical separation“ in accordance with EN 61558-1 and
EN 61558-2-6. Voltages must be limited to the safety extra-low
voltage range in accordance with EN 60204-1. We recommend
the use of SELV/PELV power packs.
1 Filter under cover
11
(0.43)
6,5
(0.26)
BA
P Y
11,5
(0.45)
18,7
(0.74)
15,7
(0.62)
173
(6.8)
268
(10.6)
36
(1.4)
138
(5.4)
158
(6.2)
80
(3.1)
157
(6.2)
174
(6.9)
75
(3.0)
47
(1.9)
1,3
(0.05)
X
1
Installation drawing
3) Frequency from 50 Hz to 10 kHz
4) Measured at ambient temperature 25 °C (77 °F) and supply
voltage 24 V
11Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® HIGH FLOW PILOT STAGE
11
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® HIGH FLOW PILOT STAGE
Step response Frequency response
20/90 l/min (5.3/23.8 gpm)
100
75
0 5 10 15 20 3025
50
25
0
Stroke [%]
Time [ms]
5%
25%
90%
101 100
0
-30
-60
-90
-120
-150
-12
-9
-6
-3
0
3
Amplitude [db]
Phase lag [degree]
Frequency [Hz]
1,000
40/80 l/min (10.6/21.1 gpm)
100
75
0 5 10 15 20 3025
50
25
0
Stroke [%]
Time [ms]
5%
25%
90%
101 100
0
-30
-60
-90
-120
-150
-12
-9
-6
-3
0
3
Amplitude [db]
Phase lag [degree]
Frequency [Hz]
1,000
120/160/ 180 l/min (31.7/42.3/ 47.6 gpm)
100
75
0 5 10 15 20 3025
50
25
0
Stroke [%]
Time [ms]
5%
25%
90%
101 100
0
-30
-60
-90
-120
-150
-12
-9
-6
-3
0
3
Amplitude [db]
Phase lag [degree]
Frequency [Hz]
1,000
12Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® HIGH FLOW PILOT STAGE
12
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D671 WITH SERVOJET® HIGH FLOW PILOT STAGE
Hydraulic symbol
4-way version, alternatively X and Y external
X Y
A B
P T T
1
Typical flow characteristics
Measured with operational pressure of 210 bar
(3,000 psi), oil viscosity 32 mm
2
/s and oil temperature of
40 °C (104 °F).
Flow vs. signal curves at Δp
N
= 35 bar (500 psi) per spool land
0
0 20 40 60 80 100
Q [l/min (gpm)]
Signal [%]
200 (52.8)
180 (47.6)
20 (5.3)
40 (10.6)
60 (15.9)
80 (21.1)
100 (26.4)
120 (31.7)
140 (37.0)
160 (42.3)
Hole pattern of mounting surface
The mounting surface must conform to ISO 4401-05-
05-0-05 with additional T
1
. Observe mounting length of
minimum 100 mm (3.94 in) and O-ring recesses for X and Y.
For 4-way valves with Q > 150 l/min (39.6 gpm) the second
tank port T
1
is required.
For maximum flow the ports for P, T, T
1
, A and B must be
designed with Ø 11.5 mm (0,45 in), not according to the
standard.
Evenness of connecting surface has to be 0.01 mm (0.004
in) over 100 mm (3.94 in), average surface finish R
a
better
than 0.8 µm.
23
(0.91)
64.6
(2.5)
10.6
(0.42)
x
y
100
(3.9)
F
1
F
2
F
4
F
3
P
A
B
T
T
1
X
Y
14.5
(0.57)
11
(0.4)
75
(3.0)
19
(0.75)
19
(0.75)
9.9
(0.39)
Designation P A B T T
1
X Y F
1
F
2
F
3
F
4
Size Ø mm
in
11.5
0.45
11.5
0.45
11.5
0.45
11.5
0.45
11.5
0.45
6.3
0.25
6.3
0.25
M6
M6
M6
M6
M6
M6
M6
M6
Position X mm
in
6.3
0.25
21.4
0.84
21.4
0.84
32.5
1.28
32.5
1.28
11.0
0.43
11.0
0.43
0.0
0
0.0
0
46.0
1.81
46.0
1.81
Position Y mm
in
27.0
1.06
16.7
0.66
37.3
1.47
3.2
0.13
50.8
2
-8.0
-0.31
62.0
2.44
0.0
0
54.0
2.13
54.0
2.13
0.0
0
13Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D672 WITH 2-STAGE SERVOJET® D670
13
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D672 WITH 2-STAGE SERVOJET® D670
General technical data
Valve design 3-stage, with spool and bushing
Pilot valve 2-Stage ServoJet® D670
Mounting surface ISO 4401-07-07-0-05
Installation position Any
Weight 13.5 kg (29.8 lb)
Storage temperature range -40 to +80 °C (-40 to +176 °F)
Ambient temperature range -20 to +60 °C (-4 to +140 °F)
Vibration resistance (general) 30 g, 3 axis, 10 Hz to 2 kHz
Shock resistance (general) 50 g, 6 directions
Hydraulic data
Operating pressure pilot valve
Minimum pressure 0.3 x system pressure above T or Y, at least 25 bar
(360 psi)
Operating pressure range X port 25 to 350 bar (360 to 5,000 psi)
Maximum pressure Y port 210 bar (3,000 psi)
Maximum operating pressure of main stage
Port P, A, B 350 bar (5,000 psi)
Port T at Y internal 210 bar (3,000 psi)
Port T at Y external 350 bar (5,000 psi)
Rated flow at Δp
N
35 bar/spool land (500 psi/spool land) 160 l/min (42.3 gpm) 240 l/min (63.4 gpm)
Maximum flow 450 l/min (118.9 gpm)
Main stage leakage flow (rate) (≈ zero lap)
1) see next page
3.5 l/min (0.9 gpm)
Pilot flow static
1) see next page
3.5 l/min
Pilot flow for 100 % step
1) see next page
17 l/min (4.5 gpm)
Hydraulic fluid Hydraulic oil as per DIN 51524 parts 1 to 3 and ISO 11158.
Other fluids on request.
Temperature range of hydraulic fluid -20 to +80 °C (-4 to +176 °F)
Recommended viscosity range 32 to 68 mm
2
/s (cSt)
Maximum permissible viscosity range 5 to 400 mm
2
/s (cSt)
Recommended cleanliness class as per ISO 4406
For functional safety 19/16/13
For longer service life 17/14/11
Typical static and dynamic data
Step response time for 0 to 100 % stroke 7 ms
Threshold < 0.1 %
Hysteresis < 0.2 %
Null shift at ΔT = 55 K < 1.5 %
Sample deviation of rated flow ±10 %
14Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D672 WITH 2-STAGE SERVOJET® D670
14
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D672 WITH 2-STAGE SERVOJET® D670
Electrical data
Duty cycle 100 %
Degree of protection according to EN 60529 IP65 with mounted mating plugs
Supply voltage
2)
18 to 32 V
DC
Permissible ripple of supply voltage
3)
±3 V
Maximum current consumption static
4)
0.25 A
Maximum current consumption dynamic
4)
2.1 A
Fuse protection, external, per valve 2.5 A (slow)
EM compatibility Emitted interference as per EN 61000-6-4:2005,
interference immunity as per EN 61000-6-2:2005
1) Measured at 210 bar (3,000 psi) pilot or system pressure, oil
viscosity 32 mm
2
/s and oil temperature 40 °C (104 °F)
2) All connected circuits must be isolated from the mains supply
by „electrical separation“ in accordance with EN 61558-1
and EN 61558-2-6. Voltages must be limited to the safety
extra-low voltage range in accordance with EN 60204-1. We
recommend the use of SELV/PELV power packs.
Installation drawing
262
(10.3)
20
(0.79)
93
(3.7)
13,9
(0.55)
26,5
(1.0)
339,8
(13.4)
86.4
(3.4)
18
(0.70)
11
(0.43)
3
(0.12)
44,5
(1.75)
1.3
(0.05)
5
(0.20)
2
(0.08)
51
(2.1)
107
(4.2)
3) Frequency from 50 Hz to 10 kHz
4) Measured at ambient temperature 25 °C (77 °F) and supply
voltage 24 V
15Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D672 WITH 2-STAGE SERVOJET® D670
15
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D672 WITH 2-STAGE SERVOJET® D670
Step response Frequency response
160 l/min (42.3 gpm)
100
75
0 5 10 15 20 3025
50
25
0
Stroke [%]
Time [ms]
5%
25%
90%
101 100
0
-30
-60
-90
-120
-150
-12
-9
-6
-3
0
3
Amplitude [db]
Phase lag [degree]
Frequency [Hz]
1,000
240 l/min (63.4 gpm)
100
75
0 5 10 15 20 3025
50
25
0
Stroke [%]
Time [ms]
5%
25%
90%
101 100
0
-30
-60
-90
-120
-150
-12
-9
-6
-3
0
3
Amplitude [db]
Phase lag [degree]
Frequency [Hz]
1,000
16Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
D672 WITH 2-STAGE SERVOJET® D670
16
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
D672 WITH 2-STAGE SERVOJET® D670
Hydraulic symbol
4-way version, alternatively X and Y external
X Y
A B
P T
Typical flow characteristics
Measured with operational pressure of 210 bar
(3,000 psi), oil viscosity 32 mm
2
/s and oil temperature of
40 °C (104 °F).
Flow signal curves at ΔpN = 35 bar per spool land
0
100806040200
Q [l/min (gpm)]
Signal [%]
250 (66.0)
200 (52.8)
150 (39.6)
100 (26.4)
50 (13.2)
Hole pattern of mounting surface
The mounting surface must correspond to ISO
4401-07-07-0-05.
For maximum flow the ports for P, T, A and B must be
designed with Ø 20 mm (0.79 in), not according to the
standard.
Evenness of connecting surface 0.01 mm (0.004 in) over
100 mm (3.94 in), average surface finish R
a
better than 0.8
µm.
12
(0.47)
x
y
125
(4.9)
14,1
(0.56)
98
(3.9)
F
4
F
1
F
5
XPT
G
1
F
2
A
F
6
F
3
G
2
Y
B
Designation P A T B X Y G
1
G
2
F
1
F
2
F
3
F
4
F
5
F
6
Size Ø mm
in
20.0
0.79
20.0
0.79
20.0
0.79
20.0
0.79
6.3
0.25
6.3
0.25
4.0
0.16
4.0
0.16
M10
M10
M10
M10
M10
M10
M10
M10
M6
M6
M6
M6
Position X mm
in
14.3
0.56
55.6
2.19
14.3
0.56
55.6
2.19
15.9
0.63
57.2
2.25
0.0
0
69.9
2.75
0.0
0
0.0
0
69.9
2.75
69.9
2.75
-1.6
-0.06
71.5
2.81
Position Y mm
in
50.0
1.97
34.1
1.34
18.3
0.72
65.9
2.59
76.6
3.02
88.1
3.47
76.6
3.02
18.3
0.72
0.0
0
101.6
4
101.6
4
0.0
0
34.1
1.34
50.0
1.97
17Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
ELECTRONICS
17
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
ELECTRONICSELECTRONICS
Pin assignment for valves with 6-pole + PE connector, male (X1)
As per EN 175201-804, mating connector (type R or S, metal) with preleading protective earth pin ( )
B
C
D
F
E
A
Pin Pin assignment Signal type
Voltage floating ±10 V Current floating ±10 mA, 4 to 20 mA
1)
A Supply voltage 24 V DC (18 to 32 V DC) referred to GND
(polarized against GND)
24 V DC (18 to 32 V DC) referred to GND
(reverse polarity protected against GND)
B GND Power ground / signal ground
C Enable input > 8.5 to 32 V DC referred to GND: valve ready for operation (enabled)
6.5 V DC referred to GND: valve disabled
The input resistance is 10 kΩ
D Command input
differential amplifier
inputs
The potential difference (referred to
GND) must be between -15 V and +32 V
U
in
= U
DE
R
in
= 20 kΩ
The potential difference (referred to
GND) must be between -15 V and +32 V
I
in
= I
D
= -I
E
R
in
= 200 Ω
I
max
= ±25 mA
E
F Actual value output I
out
: 4 to 20 mA referred to GND. R
L
= 0 to 500 Ω
(I
out
is proportional to the spool position, 12 mA corresponds to the valve mid position)
Protective earth (PE) Connected with valve body
1) Command signals I
in
< 3 mA (due to cable break, for example) indicates a failure of 4 to 20 mA signals. The valve reaction to this
failure may be customized and activated by the customer.
18Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
ELECTRONICS
18
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
ELECTRONICSELECTRONICS
Order code Command signal
Q ±100 % spool
stroke
Actual value
±100 % spool
stroke
Command signal Q
polarity 6 + PE
Actual value Q
polarity 6 + PE
Hydraulic
D ±10 V 2 to 10 V U
D
- U
E
= 10 V U
F
- U
B
= 10 V P→A and B→T
E 4 to 20 mA 4 to 20 mA I
D
= - I
E
= 20 mA I
F
= - I
B
= 20 mA P→A and B→T
M ±10 V 4 to 20 mA U
D
- U
E
= 10 V I
F
= - I
B
= 20 mA P→A and B→T
X ±10 mA 4 to 20 mA I
D
= - I
E
= 10 mA I
F
= - I
B
= 20 mA P→A and B→T
Order codes, signal and pin assignment for valves with 6-pole + PE connector
Command signal
Command signal ±10 V, floating, order code D and M
GND
R
e
0 V +24 V
D
E
B
A
U
DE
Supply
Control
U
Command signal
Signal
Valve
Command signal ±10 mA, floating, order code X
R
e
0 V +24 V
D
E
B
A
I
D
I
E
U
DE
Valve
Control
I
Command signal
Supply
Command signal 4 to 20 mA, floating (12 mA = valve mid
position), order code E
R
e
0 V +24 V
D
E
B
A
I
E
I
D
U
DE
Valve
Control
I
Command signal
Supply
Actual value
Actual value I
out
(spool position)
I
out
R
L
V
U
out
F
B
(GND)
Valve
Command signal U
out
= 2 to 10 V
Actual value I
out
= 4 to 20 mA
Resistor R
L
= 500 Ω (0.25 W)
With order code „D“ load resistor R
L
is in the valve electronics.
Further information in Moog Technical Notes TN353 and TN494.
19Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
ELECTRONICS
19
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
ELECTRONICS
161
(6.3)
135
(5.3)
108
(4.3)
70
(2.8)
90
(3.5)
60
(2.4)
50
(2.0)
X1
X10
Analog interface for 2-stage valves
Order code O without fieldbus connector
X1 Valve connector
X10 Service connector
50
(2.0)
19
(0.75)
40
(1.6)
70
(2.8)
108
(4.3)
161
(6.3)
147
(5.8)
90
(3.5)
X1
X3X4
CANopen interface for 2-stage valves
Order code C CANopen
X1 Valve connector
X3 Fieldbus connector
X4 Fieldbus connector
Installation drawings electronic housing
50
(2.0)
70
(2.8)
108
(4.3)
147
(5.8)
161
(6.3)
135
(5.3)
19
(0.75)
90
(3.5)
60
(2.4)
40
(1.6)
X1
X3X4
X10
Profibus DP or EtherCAT interface for 2-stage valves
Order code D Profibus-DPE EtherCAT
X1 Valve connector
X3 Fieldbus connector
X4 Fieldbus connector
X10 Service connector
ELECTRONICS
20Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
ELECTRONICS
20
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
ELECTRONICS
Installation drawings electronic housing
ELECTRONICS
X1
48
(1.9)
38
(1.5)
15
(0.59)
108
(4.3)
133
(5.3)
153
(6.0)
X10
Analog interface for 3-stage valves
Order code O without fieldbus connector
X1 Valve connector
X10 Service connector
108
(4.3)
19
(0.75)
40
(1.6)
70
(2.8)
48
(1.9)
153
(6.0)
146
(5.7)
X1
X3X4
CANopen interface for 3-stage valves
Order code C CANopen
X1 Valve connector
X3 Fieldbus connector
X4 Fieldbus connector
108
(4.3)
146
(5.7)
48
(1.9)
19
(0.75)
40
(1.6)
70
(2.8)
93
(3.7)
134
(5.3)
153
(6.0)
X1
X3X4
X10
Profibus DP or EtherCAT interface for 3-stage valves
Order code D Profibus-DPE EtherCAT
X1 Valve connector
X3 Fieldbus connector
X4 Fieldbus connector
X10 Service connector
21Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
ELECTRONICS
21
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
ELECTRONICSELECTRONICS
Fieldbus connectors
• Coding A
• Thread M12x1
• 5-pole
Pin Signal X3, X4 Description
1 CAN_SHLD Shield
2 CAN_V+ Not connected in the
valve
3 CAN_GND Mass
4 CAN_H Transceiver H
5 CAN_L Transceiver L
External thread, pin contact
View on CAN connector X3
Internal thread, socket
contact
View on CAN connector X4
CAN connectors (X3, X4)
32
41
5
5
4
3
1
2
• Coding D
• Thread M12x1
• 4-pole
Pin Signal X4 IN Signal X3 OUT
1 TX + IN TX + OUT
2 RX + IN RX + OUT
3 TX – IN TX – OUT
4 RX – IN RX – OUT
Internal thread, socket
contact
View on EtherCAT
connector X3
Internal thread, socket
contact
View on EtherCAT
connector X4
EtherCAT IN & OUT connectors (X3, X4)
3
4
2
1
3
4
2
1
• Coding B
• Thread M12x1
• 5-pole
Pin Signal X3, X4 Description
1 Profi V+ Power supply 5 V of
terminal resistors
2 Profi A Receive/transmit
data –
3 Profi GND Mass
4 Profi B Receive/transmit
data +
5 Shield Shield
External thread, pin contact
View on Profibus-DP
connector X3
Internal thread, socket
contact
View on Profibus-DP
connector X4
Profibus-DP connectors (X3, X4)
32
41
5
5
4
3
1
2
22Rev C July 2011
TECHNICAL DATA Moog D671 and D672 Servo Valves
SAFETY OPTIONS
22
TECHNICAL DATA
Rev C July 2011
Moog D671 and D672 Servo Valves
SAFETY OPTIONS
If the electric power supply or the pilot pressure fails, different spool positions can be selected for the servovalves.
The following table is an aid to selecting the desired performance. It describes the spool position of the main stage as a
function of the pilot pressure and the power supply of the valve electronics.
Valves with ServoJet® Pilot Stage
Order code - Fail safe
option
Pilot pressure (or system
pressure in case of internal
pilot connection)
Electrical supply Spool position in case of
power fail/ loss of pilot
pressure
A On Off End position P→B and A→T
Off On Undefined
Off Off Undefined
B On Off End position P→A and B→T
Off On Undefined
Off Off Undefined
O On Off Undefined
Off On Undefined
Off Off Undefined
Pilot pressure „On“ means that the pilot pressure corresponds to the minimum pressure (see hydraulic data). At lower
pressures the spool position of the main stage is undefined.
Pilot pressure „Off“ means depressurized, < 1 bar (15 psi). At higher pressures the spool position of the main stage is
undefined.
23Rev C July 2011
BACKGROUND Moog D671 and D672 Servo Valves
DESCRIPTION OF OPERATION
23
BACKGROUND
Rev C July 2011
Moog D671 and D672 Servo Valves
DESCRIPTION OF OPERATIONDESCRIPTION OF OPERATION
The ServoJet® Pilot Stage is based on the jet pipe design
and consists mainly of torque motor, jet pipe and receiver.
An electric current through the coil (1) displaces the
armature (2) from its neutral position. This displacement
moves the nozzle (4) of the jet pipe (3) and directs a
focused fluid jet towards one side of the receiver (5).
This creates a pressure difference in the control ports
(6) at the ends of the spool. The spool moves into the
corresponding direction. The pilot stage is drained via the
valve‘s tank port or external Y-line.
The position of the spool (7) is measured by a position
transducer (8). The valve electronics closes the position
control loop (9) and moves the spool precisely to its
position specified electrically by an external source.
Principle of operation of the ServoJet® Pilot Stage
+
–
9
8
4
5
3
6
7
2
1
1 Coil
2 Armature
3 Jet pipe
4 Nozzle
5 Receiver
6 Control ports
7 Spool
8 Position transducer
(LVDT)
9 Position control loop
Background
2-Stage Servovalve with ServoJet® Pilot Stage
Benets
The ServoJet® Pilot Stage has a very simple structural
design with comparatively large gaps. This ensures that
the assembly is less sensitive to fluid contamination. It is
extremely reliable and guarantees safe operation, even in
demanding environments. There is a small, constant and
calculable flow of pilot oil.
Due to its low moving mass and high rigidity, the ServoJet®
Pilot Stage has a very high natural frequency. In addition, it
has been designed with a good dampening property which
is ideal for use as the pilot stage in a valve‘s closed-loop
position control to achieve maximum performance.
With two pilot stage options (Standard and High Flow) a
user can choose the dynamic response needed for their
application.
The benefits:
• High reliability
• Ruggedness
• Long service life
• Insensitivity to contamination
• High-dynamic response
This results in the following benefit for your application:
• Higher productivity with consistent high quality of the
produced parts
Cutaway view, 2-stage servovalve
1
7
2 3
56
4
1 ServoJet® pilot valve
2 Valve connector
3 Service connector
4 Digital electronics
5 Position transducer
(LVDT)
6 Spool
7 Connecting surface
24Rev C July 2011
BACKGROUND Moog D671 and D672 Servo Valves
DESCRIPTION OF OPERATION
24
BACKGROUND
Rev C July 2011
Moog D671 and D672 Servo Valves
DESCRIPTION OF OPERATIONDESCRIPTION OF OPERATION
A 3-stage servovalve consists of the pilot stage (1), the
spool of the pilot valve (2) and the spool of the main stage
(3). The ServoJet® Pilot Stage is based on the jet pipe
design.
The ServoJet® Pilot Stage moves the position-controlled
spool of the pilot valve (2), which in turn moves the
position-controlled spool of the main stage (3). The two
closed-position control loops (4, 5) in the valve electronics
moves the spool of the main stage precisely to its position
specified electrically from an external source.
Principle of operation of the 3-stage valve with 2-Stage ServoJet®
Pilot Valve D670
+
–
+
–
2
5
4
1
3
1 Pilot stage
2 Spool, pilot valve
3 Spool, main stage
4 Position control loop,
main stage
5 Position control loop, pilot
valve
Benets
The 2-stage ServoJet® Pilot Valve D670 features a
dynamically enhanced ServoJet® Pilot Stage. Its natural
frequency has been doubled compared to the standard
version. Combined with the high flow rate of a 2-stage
pilot valve a superior dynamic performance is obtained.
Sophisticated digital control algorithms enable high
stability.
Employing the proven jet pipe principle, the same
robustness and reliability are obtained as for the single
stage ServoJet® Pilot Valve.
The benefits:
• High availability
• High reliability
• Ruggedness and long service life
• Insensitivity to contamination
•
This results in the following benefits for your application:
• Higher productivity with consistent high quality of the
produced parts
• Highest dynamic response
Cutaway view, 3-stage servovalve
56
1 3 42
7
3-Stage Servovalve with 2-Stage ServoJet® Pilot Valve D670
1 ServoJet® Pilot Valve
2 Service connector
3 Valve connector
4 Digital electronics
5 Position transducer
(LVDT)
6 Spool
7 Connecting surface
25Rev C July 2011
BACKGROUND Moog D671 and D672 Servo Valves
FLOW CALCULATION
25
BACKGROUND
Rev C July 2011
Moog D671 and D672 Servo Valves
FLOW CALCULATION
When the valve is open, the prevailing flow is dependent
not only on the spool position, i.e. the opening cross-
section of the valve, but also on the pressure drop at the
individual lands.
When the valve is deflected at 100 %, it delivers the rated
flow with the rated pressure drop.
On servo valves, the rated flow corresponds to a pressure
drop of 35 bar (500 psi) per land, equating to 70 bar
(1,000 psi) for two lands. When a valve is opened at
100 %, the flow can be calculated as a function of the
actual pressure drop with the aid of the formula below or
taken from the diagram.
Q = Q
N
.
p
p
N
Q [l/min (gpm)] actual flow
Q
N
[l/min (gpm)] rated flow
Δp [bar (psi)] actual pressure drop per spool land
Δp
N
[bar (psi)] rated pressure drop per spool land
Flow diagram
D672
D671
300
(4,350)
20
(290)
30
(435)
10
(145)
5
(75)
1
(15)
70
(1,000)
p [bar (psi)]
Q [l/min (gpm)]
500 (132)
300 (79.3)
200 (52.8)
150 (39.6)
100 (26.4)
80 (21.1)
50 (13.2)
30 (7.93)
20 (5.28)
15 (3.96)
10 (2.64)
8 (2.11)
5 (1.32)
3 (0.79)
2 (0.53)
120 (31.7)
180 (47.6)
80 (21.1)
20 (5.3)
40 (10.6)
160 (42.3)
90 (23.8)
240 (63.4)
The actual flow in the valve ports must not exceed a mean
flow velocity of approximately 30 m/s (96.5 ft/s) due to
the risk of cavitation.
When operating the valves close to these application
limits, it is necessary to drill the ports to the maximum
possible diameters (see specifications for the respective
valve).
In the case of a mounting surface in accordance with
ISO 4401 size 05 the second tank port must additionally
be connected starting from a flow Q exceeding 150 l/min
(39.6 gpm).
The ports inside the manifold should exceed the valve
ports by one or two sizes to achieve the maximum flow.
26Rev C July 2011
BACKGROUND Moog D671 and D672 Servo Valves
DIGITAL ELECTRONICS
26
BACKGROUND
Rev C July 2011
Moog D671 and D672 Servo Valves
DIGITAL ELECTRONICS
Digital valve electronics
The valve electronics is based on microprocessor
hardware with corresponding A/D-D/A converters for
analog input and output signals. All functions of the valve
are integrated in the firmware. The digital electronics
offer the following advantages over conventional analog
electronics:
• Greater flexibility: Ability to change the valve
parameters easily using configuration software and
the possibility of linearizing flow curves
• Higher reliability due to integrated monitoring
functions
• Easier maintenance due to diagnostic capability and
recording the fault history
• Remote maintenance and setup
Using the optional fieldbus interface cuts down the
amount of wiring needed and eliminates the need for
control interfaces in the PLC.
In the basic version the valve has a standard connector,
and service connector and does not include the fieldbus
interface. In this case the valve is actuated via an analog
command signal.
The service connector offers the possibility to connect the
valve to a PC or Notebook via an USB-to-CAN adaptor (see
accessories). Its CANopen interface offers access to the
valve parameters, which can be changed and monitored, as
well as diagnosing valve performance and possible faults.
The flexibility of the integrated firmware enables the user
to optimize the valve characteristic on-site as required by
the application:
• Adapting the valve flow curve to the needs of the
controlled system
• Adjusting the maximum valve opening separately for
each direction of motion
• Defining fault reactions
The results obtained by the parameter changes can be
viewed and analyzed directly using the built-in data logger.
The parameters optimized during commissioning can be
saved and copied. When the valve is replaced or used for
series applications no tuning is required. The valves are
supplied with a predefined parameter set if required.
Optional fieldbus interface
When the valves are operated with a fieldbus, they are
parameterized, activated and monitored via the fieldbus.
CANopen®, Profibus-DP® or EtherCAT® interfaces are
available, others upon request. The fieldbus interface is
equipped with two bus connectors (IN & OUT) for cost-
effective wiring. Valves can be integrated directly into the
bus without any external T-joints. The electrically isolated
fieldbus interface ensures reliable data transfer. Further
analog inputs and outputs and inputs for SSI or encodesr
are available upon request.
27Rev C July 2011
BACKGROUND Moog D671 and D672 Servo Valves
FIELDBUS INTERFACE
27
BACKGROUND
Rev C July 2011
Moog D671 and D672 Servo Valves
FIELDBUS INTERFACE
Modern automation technology is characterized by an
increasing decentralization of processing functions via
serial data communication systems. The use of serial bus
systems in place of analog signal transfer guarantees
greater system flexibility with regard to alterations and
expansions.
There is also considerable potential for saving project
planning and installation costs in many areas of industrial
automation. Further possibilities of parameterization,
better diagnostics and a reduction of the number of
variants are advantages which have only been made
possible by the use of field buses.
VDMA prole
In a working group within the VDMA (German Machinery
and Plant Manufacturers‘ Association), a profile was
created in collaboration with numerous well-known
hydraulic system manufacturers. This profile describes
the communication between hydraulic components via a
fieldbus and defines uniform functions and parameters.
In this way, a standardized exchange format covering all
manufacturers was created.
Moog Valves are optionally equipped with one of the
following fieldbus interfaces:
CANopen®
According to EN 50325-4 CAN bus was originally
developed for use in automobiles, but has also been used
for years a variety of industrial applications. The CAN
bus is primarily designed for transmission reliability and
speed.
The CAN bus has the following general features:
• Multi-master system: Each node can transmit and
receive
• Topology: Line structure with short stub cables
• Network expansion and transmission rates:
- Up to 25 m (80.4 ft) at 1 Mbit/s
- Up to 5,000 m (16,090 ft) at 25 kbit/s
• Addressing type: Message-orientated via identifiers.
Priority assignment of messages possible via
identifiers
• Safety: Hamming distance=6, i.e. up to 6 individual
errors per message are detected.
• Bus physics: ISO 11898
• Maximum number of nodes: 110 (64 without repeaters)
Probus-DP®
According to EN 61158 Profibus-DP® was developed for
the process and manufacturing industries. IT is thereby
supported by numerous control system manufacturers.
Profibus-DP® has the following features:
• Multi-master system: The masters share access time
and initiate communication. The slaves react only upon
request
• Topology: Line structure with short stub cables
• Network expansion and transmission rates:
- Up to 100 m (321.8 ft) at 12 Mbit/s
- Up to 1,200 m (3,861.6 ft) at 9,6 kbit/s per segment
• Use of repeaters possible
• Addressing type: Address-orientated. Priority/cycle
time assignment of messages via master configuration
• Bus physics: RS-485 in accordance with EIA-485
• Maximum number of nodes: 126 (32 without repeaters)
EtherCAT®
According to IEC/PAS 62407 EtherCAT® was developed
based on the Ethernet as an industry bus based on
Ethernet to meet the increasing demands regarding
cycle times. The EtherCAT® bus is designed for high data
transmission rates and fast cycle times.
The EtherCAT® bus has the following features:
• Single-master system: The master initiates
communication. The slaves react only upon request
• Topology: Line, star, tree and ring structure based on
the daisy chain principle
• Network expansion and transmission rates: 100 m
(321.8 ft) between two nodes at 100 Mbit/s
• Addressing type: Address-orientated, one telegram for
all nodes
• Bus physics: Fast Ethernet 100 Base Tx
• Maximum number of nodes: 65,535
28Rev C July 2011
BACKGROUND Moog D671 and D672 Servo Valves
CONFIGURATION SOFTWARE
28
BACKGROUND
Rev C July 2011
Moog D671 and D672 Servo Valves
CONFIGURATION SOFTWARE
The Windows®-based “Moog Valve Configuration Software”
enables fast and convenient commissioning, diagnostics
and configuration of the valve. It is possible to transfer
data from the PC to the valve or to process the valve‘s
current settings on the PC. The valve can be controlled by
means of graphical control elements. Status information,
command signals, actual values and characteristic curves
are represented in graphical form. System parameters can
be recorded and visualized via an integrated data logger.
The software is available free of charge from Moog upon
request. Please visit www.moog.com/industrial/downloads
to download the software.
System requirements
The configuration software can be installed on a PC with
the following minimum requirements:
• IBM PC-compatible with 133 MHz
• Windows® 95/98/ME, Windows® NT/2000/XP
• 64 MB RAM
• 40 MB free hard disk space
• Monitor resolution 640 x 480 pixels
• Keyboard, mouse
Recommended requirements
• IBM PC-compatible with 500 MHz
• Windows® NT/2000/XP/Vista
Equipment
The following equipment is also required to be able to use
the software (see also list of accessories):
• USB port
• USB CAN adapter
• Configuration/commissioning cable
• Adapter for service connector (not required for
CANopen fieldbus)
• Valve electrically connected and power supply
switched on
Note
Configuration or commissioning with the “Moog Valve
Configuration Software” can be performed via:
• Fieldbus connectors on valves with a CANopen fieldbus
• Integrated service connector on valves with Profibus
DP or EtherCAT fieldbus or on valves with analog
activation
29Rev C July 2011
BACKGROUND Moog D671 and D672 Servo Valves
ABOUT MOOG
29
BACKGROUND
Rev C July 2011
Moog D671 and D672 Servo Valves
ABOUT MOOG
Moog Inc. is a worldwide designer, manufacturer and
integrator of precision control components and systems.
Moog’s Industrial Group designs and manufactures
high performance motion control solutions combining
electric, hydraulic, and hybrid technologies with expert
consultative support in a range of applications including
energy production and generation machinery, industrial
production machinery and simulation and test equipment.
We help performance-driven companies design and
develop their next-generation machines. Moog’s Industrial
Group, with fiscal year 2010 sales of USD 540 million
and over 40 locations worldwide, is part of Moog Inc.
(NYSE:MOGA and MOG.B) which has sales of USD 2.1
billion.
Moog maintains facilities in 25 countries around the globe.
This vast scope ensures that our engineers remain close
to the needs of machine builders and provide flexible
design solutions and technical expertise tailored to our
customers’ toughest challenges.
Moog experts work in close collaboration with machine
builders and application engineers to design motion
control systems for greater productivity, higher reliability,
superior connectivity, less costly maintenance and more
effective operations. Our regional presence, industry
knowledge and design flexibility ensures Moog motion
control solutions are tailored to their environment—
from meeting operating regulations and performance
standards, to taking machine performance to a higher
level.
Products
At the heart of every Moog solution is an array of products
engineered for precision, high performance and reliability.
For more than six decades, Moog products have been
specified for critical machine applications.
Some are developed specifically for unique operating
environments. Others are standard equipment on
machines across many industries. All are continuously
improved to take advantage of the latest technology
breakthroughs and advancements.
Moog products include:
• Servo Valves and Proportional Valves
• Servo Motors and Servo Drives
• Servo Controllers and Software
• Radial Piston Pumps
• Actuators
• Integrated Hydraulic Manifold Systems and Cartridge
Valves
• Slip Rings
• Motion Bases
Servo Valves
Radial Piston Pumps
Servo Motors
Servodrives
30Rev C July 2011
BACKGROUND Moog D671 and D672 Servo Valves
ABOUT MOOG
30
BACKGROUND
Rev C July 2011
Moog D671 and D672 Servo Valves
ABOUT MOOG
Solutions
Moog Global Support
Moog Global Support™ is our promise to offer world-class
Repair and Maintenance Services delivered expertly by our
trained technicians. With the reliability only available from
a leading manufacturer with facilities around the world,
Moog offers you service and expertise you can count on to
keep your equipment operating as it should.
This promise offers many benefits to our customers
including:
• Reduce your downtime by keeping critical machines
running in peak performance
• Protect your investment by ensuring reliability,
versatility and long-life of products
• Better plan your maintenance activities and make
systematic upgrades
• Leverage our flexible programs to meet the unique
service requirements of your facility
Look to Moog for global support including:
• Repair services using OEM parts are performed by
trained technicians to the latest specifications
• Stock management of spare parts and products to
prevent unplanned downtime
• Flexible programs, tailored to your needs such as
upgrades, preventative maintenance and annual/multi-
year contracts
• On-site services bring the expertise to you, providing
quicker commissioning, set-up and diagnostics
• Access to reliable services that are guaranteed to
offer consistent quality anywhere in the world
For more information on Moog Global Support™, visit www.
moog.com/industrial/service.
GLOBAL
SUPPORT
™
Hydraulic solutions
Since Bill Moog invented the first commercially viable
servovalve in 1951, Moog has set the standard for world-
class hydraulic technology. Today, Moog products are
used in a variety of applications - providing high power,
enhanced productivity and ever better performance for
some of the worlds most demanding applications.
Electric solutions
Clean operation, low noise generation, less maintenance
and reduced power consumption make Moog electric
solutions ideal for applications worldwide. Moog is
the ideal partner for applications where transitioning
technologies requires special expertise.
Hybrid solutions
By incorporating the advantages of existing hydraulic
and electric technologies - including modular flexibility,
increased efficiency and cleanliness - into innovative
hybrid solutions, Moog offers new performance potential
in specialized applications.
31Rev C July 2011
ORDERING INFORMATION Moog D671 and D672 Servo Valves
ACCESSORIES AND SPARE PARTS
31
ORDERING INFORMATION
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Moog D671 and D672 Servo Valves
ACCESSORIES AND SPARE PARTSACCESSORIES AND SPARE PARTS
Ordering information
Series-dependent accessories and spare parts
Spare parts D671
Part designation Description Material Part number
O-ring for filter 1 piece for filter
inner Ø 12.0 (0.47) x Ø 2.0 mm (0.08 in)
FKM 85 Shore A25163-012-020
1 piece inner Ø 12 x Ø 2.0 mm NBR 85 Shore -66117-012-020
O-ring for filter cover FKM 85 Shore -42082-080
1 piece for filter cover
inner Ø 17.1 (0.67) x Ø 2.6mm (0.10in)
NBR 85 Shore B97009-080
Replaceable filter 200 µm nominal A67999-200
Service sealing set Contains the following O-rings:
• 5 pieces for P, T, T
1
, A, B
inner Ø 12.4 (0.49) x Ø 1.8 mm (0.07 in)
• 2 pieces for X, Y
inner Ø 15.6 (0.61) x Ø 1.8 mm (0.07 in)
• 1 piece for filter
inner Ø 12.0 (0.47) x Ø 2.0 mm (0.08 in)
• 1 piece for filter cover
inner Ø 17.1 (0.67) x Ø 2.6 mm (0.10 in)
FKM 85 Shore B97215-V661F10
NBR 85 Shore B97215-N661F10
Accessories D671
Part designation Description Part number
Attachment screws 4 pieces M6x60, ISO 4762-10.9
tightening torque 11 Nm (97 lbf in)
A03665-200-090
Connecting plates - On request
Flushing plate P, T, T
1
, X, Y B67728-002
P, T, T
1
and X, Y B67728-003
Spare parts D672
Part designation Description Material Part number
Service sealing set Contains the following O-rings:
• 4 pieces for P, T, A, B
inner Ø 21.89 (0.86) x Ø 2.6 mm (0.10 in)
• 2 pieces for X, Y
inner Ø 10.82 (0.43) x Ø 1.8 mm (0.07 in)
FKM 85 Shore B97215-V6X2-16
NBR 85 Shore B97215-N6X2-16
Service sealing set, pilot
valve
Note: Filter change on D670 pilot valve only
possible through Moog Global Support™
FKM 85 Shore B97215-V630F63
NBR 85 Shore B97215-N630F63
Accessories D672
Part designation Description Part number
Attachment screws 2 pieces M6x55, ISO 4762-10.9
tightening torque 11 Nm (97 lbf in)
A03665-060-055
4 pieces M10x60, ISO 4762-10.9
tightening torque 54 Nm (40 lbf ft)
A03665-100-060
Flushing plate P, T, X, Y -76741
32Rev C July 2011
ORDERING INFORMATION Moog D671 and D672 Servo Valves
ACCESSORIES AND SPARE PARTS
32
ORDERING INFORMATION
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Moog D671 and D672 Servo Valves
ACCESSORIES AND SPARE PARTSACCESSORIES AND SPARE PARTS
Accessories D671 and D672 Servo Valves
Part designation Description Remark Part number
Accessories for CAN bus M12x1 connector with
terminal resistor
CA63585-001
M12x1 socket with terminal
resistor
CA63584-001
Dust protection cap for
fieldbus connectors X3, X4
For external thread M12x1 Required for operation
without mating connector (IP
protection)
C55823-001
For internal thread M12x1 CA24141-001
Mains power connection Power pack 24 V, 10 A D137-003-001
Power supply cable, length
2 m (78.7 in)
B95924-002
Mating connector Cable with straight mating
connector 6-pole + PE
Length on request C21033-xxx-001
Mating connector, elbow
6-pole + PE
In accordance with EN
175201-804, type S, metal,
cable diameter minimum
8 mm (0.31 in) and maximum
12 mm (0.47 in)
B97069-061
Mating connector, straight
6-pole + PE
In accordance with EN
175201-804, type R, metal,
cable diameter minimum
8 mm (0.31 in) and maximum
12 mm (0.47 in)
B97007-061
Service and commissioning
set
Adapter, service connectors
X10, M8 in accordance with
M12x1
CA40934-001
Configuration/commissioning
cable 2 m (78.7 in)
TD3999-137
Configuration/commissioning
software
B99104
USB CAN adapter C43094-001
Documents (not included in scope of delivery)
Part designation Description Remark Part number
Manual D671 and D672
Series Servovalves
Operating Instructions Note: Visit www.moog.com/
industrial/literature to
download document
On request
Technical Note TN 353 Protective Grounding
and Electrical Shielding
of Hydraulic Valves with
Integrated Electronics
Note: Visit www.moog.com/
industrial/literature to
download document.
CA58437-001
Technical Note TN 494 Maximum Permissible Length
of Electric Cables for Valves
with Integrated Eletronics
Note: Visit www.moog.com/
industrial/literature to
download document.
CA48851-001
Series-independent accessories
33Rev C July 2011
ORDERING INFORMATION Moog D671 and D672 Servo Valves
ACCESSORIES AND SPARE PARTS
33
ORDERING INFORMATION
Rev C July 2011
Moog D671 and D672 Servo Valves
ACCESSORIES AND SPARE PARTSACCESSORIES AND SPARE PARTS
Installation drawings for accessories
Mating connector, straight 6-pole + PE
22, maximum 20 Nm
( 177 lbf in)
Ø 22
(0.86)
Ø 29
(1.13)
66
(2.61)
28,8
(1.13)
64
(2.53)
22, maximum 20 Nm
(177 lbf in)
Ø 22
(0.86)
10
(0.39)
62
(2.45)
Mating connector, elbow 6-pole + PE
34Rev C July 2011
ORDERING INFORMATION Moog D671 and D672 Servo Valves
Order COde
34
ORDERING INFORMATION
Rev C July 2011
Moog D671 and D672 Servo Valves
Order COde
G
08
15
40
D671
D671
B
O
X
10
D
E
M
X
9
Y
8
N
NBR
V
FKM
D 671 - D 672
- -- -
16
15
14
C
D
E
O
11
2
7
4
6
O
A
B
5
D671
9
S
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
5
6
7
20
30
80 D671
35
90 D671
45
120 D671
60
160 D671
75
180 D671
16
160 D672
25
240 D672
F
H
K
D671
C
D672
K
W
13
A
B
4
3
1
2
70
210
280
350
Model designation
Variant
Valve version
Servo valve
Rated flow in l/min (gpm)
Series
Factory
defined
Fieldbus
connector X3, X4
CANopen
Profibus DP
EtherCAT
Without fieldbus
connector
Maximum operating pressure in bar (psi)
For internal pilot connection X, the maximum
operating pressure is the maximum pilot pressure.
The valve electronics is adapted to the control pressure.
Bushing/spool design
Special spool on request
4-way: zero lap, linear flow characteristic
(1,000)
(3,000)
(4,000)
(5,000)
Enable function
Without enable signal, the
spool moves to a factory
defined zero position
Without enable signal, the
spool moves to a defined
final position
Supply voltage
24 V DC, for more information,
see section “Electronics“
A≥T or B T
Input Measuring output
± 10 V
4 to20 mA
2 to 10 V
4 to 20 mA
4 to 20 mA
4 to 20 mA
± 10 V
± 10 mA
Fieldbus
Fieldbus
Others on request
Signals for 100 % spool stroke
Seal material
6-pole + PE EN 175201-04
Inlet X
Internal
External
External
Internal
Outlet X
Internal
Internal
External
External
Pilot connection
ServoJet High Flow
D670 ServoJet 2-stage
ServoJet Standard
Pilot stage design
Spool position in case of power fail/loss of pilot pressure
Series
Undefined
P≥ B, A≥ T connected
P≥ A, B≥ T connected
For = 35 bar (500 psi) per spool land p
Valve connector X1
Model number (assigned at the factory) Type designation
(10.6)
(5.3)
(21.1)
(23.8)
(31.7)
(42.3)
(47.6)
(42.3)
(63.4)
N
≥
WHAT MOVES YOUR WORLDWHAT MOVES YOUR WORLD
Argentina
+54 11 4326 5916
info.argentina@moog.com
Australia
+61 3 9561 6044
info.australia@moog.com
Brazil
+55 11 3572 0400
info.brazil@moog.com
Canada
+1 716 652 2000
info.canada@moog.com
China
+86 21 2893 1600
info.china@moog.com
Finland
+358 10 422 1840
info.finland@moog.com
France
+33 1 4560 7000
info.france@moog.com
Germany
+49 7031 622 0
info.germany@moog.com
Hong Kong
+852 2 635 3200
info.hongkong@moog.com
India
+91 80 4057 6605
info.india@moog.com
Ireland
+353 21 451 9000
info.ireland@moog.com
Italy
+39 0332 421 111
info.italy@moog.com
Japan
+81 46 355 3767
info.japan@moog.com
Korea
+82 31 764 6711
info.korea@moog.com
Luxembourg
+352 40 46 401
info.luxembourg@moog.com
The Netherlands
+31 252 462 000
info.thenetherlands@moog.com
Norway
+47 6494 1948
info.norway@moog.com
Russia
+7 8 31 713 1811
info.russia@moog.com
Singapore
+65 677 36238
info.singapore@moog.com
South Africa
+27 12 653 6768
info.southafrica@moog.com
Spain
+34 902 133 240
info.spain@moog.com
Sweden
+46 31 680 060
info.sweden@moog.com
Switzerland
+41 71 394 5010
info.switzerland@moog.com
United Kingdom
+44 168 429 6600
info.uk@moog.com
USA
+1 716 652 2000
info.usa@moog.com
Take a closer look.
Moog designs a range of motion control products that complement the
performance of those featured in this catalog. Visit our website for more
information and contact the Moog facility nearest you.
www.moog.com/industrial
Moog is a registered trademark of Moog Inc. and its subsidiaries. All trademarks as indicated herein are the property
of Moog Inc. and its subsidiaries.
CANopen is a registered trademark of CAN in Automation (CiA)
EtherCAT is a registered trademark of Beckhoff Automation GmbH
Profibus-DP is a registered trademark of PROFIBUS Nutzerorganisation e.V.
Windows and Vista are registered trademarks of Microsoft Corporation
©2011 Moog Inc. All rights reserved. All changes are reserved.
D671 and D672 Servo Valves
PIM/Rev C July 2011/CDL27793-en