RE 92084/2021-04-21, Bosch Rexroth AG
Electro-hydraulic control
with proportional solenoid EP
RE 92084/2021-04-21
Replaces: 07.2004
Features
▶ Electro proportional control by acurrent signal
▶ High control accuracy
▶ Standard spring-centering of the stroking cylinder
▶ Resets to neutral position in the event of asignal failure
▶ With manual override
▶ Modular design
▶ Short control time
Related documentation
Variable pump A4VSG Datasheet 92100
Variable pump A4CSG Datasheet 92105
Mounting block SDVB (NG 40-180) Datasheet 95534
Mounting block SDVB (NG 1000) Datasheet 95533
▶ A4VSG, sizes 40 to 1000
▶ A4CSG, sizes 250 to 750
▶ Nominal pressure 350bar
▶ Maximum pressure 400bar
▶ For closed circuit
Contents
Type code 2
EP.. – Electro-hydraulic control with prop. solenoids 4
Technical data, solenoid for A4VSG and A4CSG 6
Circuit diagrams EP A4VSG NG40 to 1000 7
Dimensions EP A4VSG NG40 to 1000 9
Circuit diagrams EP A4CSG NG250 to 750 12
Dimensions EP A4CSG NG250 to 750 13
EP.. – Electro-hydraulic control with proportional sole-
noids and pressure controller 14
EPG.. – Electro-hydraulic control with proportional
solenoids and remote-controlled pressure controller 15
Circuit diagrams EPD, EPG A4VSG NG40 to 71 16
Circuit diagrams EPA, EPB, EPD A4VSG NG125 to 355 17
Circuit diagrams EPGA, EPGB, EPG
A4VSG NG125 to 355 18
Circuit diagrams EPA, EPB, EPD A4CSG
NG250 to 355 19
Circuit diagrams EPGA, EPGB, EPG A4CSG
NG250 to 355 20
Circuit diagrams EPA, EPB, EPD A4CSG NG500 to 750 21
Circuit diagrams EPGA, EPGB, EPG A4CSG
NG500 to 750 22
Dimensions EPD/EPG A4VSG NG40 to 180 23
Dimensions EPD/EPG A4VSG
and A4CSG NG250 to 750 24
Connector for solenoids 25
Project planning notes 26
Safety instructions 27
Bosch Rexroth AG, RE 92084/2021-04-21
2 Electro-hydraulic control | with proportional solenoid EP
Type code
Type code
01 02 03 04 05 06 07 08 09 10 11
G EP.. /
Axial piston unit 40 71 125 180 250 355 500 750 1000
01 Swashplate design, variable ● ● ● ● ● ● ● ● ●
A4VS
Compact unit, swashplate design, variable ‒ ‒ ‒ ‒ ● ● ● ● ‒
A4CS
Operating mode 40 71 125 180 250 355 500 750 1000
02 Pump, closed circuit
● ● ● ● ● ● ● ● ● G
Size (NG)
03
Geometric displacement
V
gmax
[cm3]
40 71 125 180 250 355 500 750 1000
Control device 40 71 125 180 250 355 500 750 1000
04 Electro-hydraulic control with proportional solenoid
2)
without pressure control
● ● ● ● ● ● ● ○ ○ EP
1)
with pressure control in A
○ ○ ● ● ● ● ● ○ ○ EPA
with pressure control remote controlled in A
○ ○ ● ● ● ● ○ ○ ○ EPGA
with pressure control in B
○ ○ ● ● ● ● ● ○ ○ EPB
with pressure control remote controlled in B
○ ○ ● ● ● ● ○ ○ ○ EPGB
with pressure control both sides in A and B
● ● ● ● ● ● ● ● ○ EPD
with pressure control remote controlled on
both sides
in A and B
● ● ● ● ● ● ● ○ ○ EPG
Series 40 71 125 180 250 355 500 750 1000
05 Series 1, index 1 A4VSG
● ● – – – – – – – 11
Series 3, index 0 A4VSG, A4CSG
– – ● ● ▲ ● ▲ ● ● 30
Series 3, index 3 Efficiency-optimized rotary group
– – – – ● – ● – – 33
Direction of rotation
Information on items 06 to 14
can be found in datasheets
92100 (A4VSG) and
92105 (A4CSG)
06
Sealing material
07
Drive shaft
08
Mounting flange
09
Working port
10
Valves
13
Filtration
14
●
= Available
○
= On request
‒
= Not available
▲
= Not for new projects
Notice
▶ Note the project planning notes on page 26.
▶ In addition to the type code, please specify the
relevant technical data when placing your order.
1) Alternating direction of rotation only possible with EP and
following consultation. With EP(G)A, EP(G)B, EPD and EPG,
analternating direction of rotation is not possible.
2) Operating voltage U = 24 V
RE 92084/2021-04-21, Bosch Rexroth AG
3 Electro-hydraulic control | with proportional solenoid EP
Hydraulic fluid and cleanliness level
Hydraulic fluid and cleanliness level
Which hydraulic fluids are suitable and approved for the
relevant axial piston variable pumps can be found in the
relevant datasheets 92100 and 92105.
Selection of hydraulic fluid
BoschRexroth evaluates hydraulic fluids on the basis of the
Fluid Rating according to the technical datasheet90235.
Hydraulic fluids with positive evaluation in the Fluid Rating
are provided in the following technical datasheet:
▶ 90245: BoschRexroth Fluid Rating List for Rexroth
hydraulic components (pumps and motors)
Bosch Rexroth AG, RE 92084/2021-04-21
4 Electro-hydraulic control | with proportional solenoid EP
EP.. – Electro-hydraulic control with proportional solenoids
EP.. – Electro-hydraulic control with proportional solenoids
Function
Depending on the preselected current strength, the
stroking cylinder of the pump is charged with control
pressure via two proportional solenoids on the EP control
module. This allows the swashplate – and, thereby, the
displacement – to be continuously adjusted. Amplifiers with
pulse width modulation are recommended for controlling
the solenoids (dither frequency and current range
see Table on page 6).
For the purpose of control, we recommend:
▶ VT-MSPA2 see datasheet 30232
For A4CSG and version F with integrated boost pump
(forA4VSG with mounted boost pump), the control is
supplied internally with the control pressure from the boost
circuit. This saves using aseparate control pressure pump.
The mechanical swivel angle limitation can be set at
bothsides from V
gmax
to 50% V
gmax
, for size 500 V
gmax
to
70% V
gmax
.
A proportional solenoid is assigned to each flow direction.
The proportional solenoids should not be operated with
acurrent higher than the rated current.
▼ Characteristic curve
I
V
g
V
g max
V
g
V
g max
I
Allocation of direction of rotation – solenoid – flow
direction
A proportional solenoid is assigned to each swivel
direction.
Direction
of rotation
Solenoid Swiveling
range
1)
Flow
direction
Pressure
side
right b right B to A A
a left A to B B
left b right A to B B
a left B to A A
1) cf. swivel angle indicator
15° 15° 0°
counter-
clockwise
clockwise
Notice
The spring feedback in the controller and pump control
spring centering are no safety devices.
The controller can stick in an undefined position due to
internal contamination (contaminated hydraulic fluid,
abrasion or residual contamination from system
components). As aresult, the flow in the axial piston unit
will no longer respond correctly to the operator's
specifications.
Check whether the application on your machine requires
additional safety measures to bring the driven consumer
to asafe position (immediate stop). If necessary,
makesure these are appropriately implemented.
RE 92084/2021-04-21, Bosch Rexroth AG
5 Electro-hydraulic control | with proportional solenoid EP
EP.. – Electro-hydraulic control with proportional solenoids
Technical data EP.. – hydraulic
Size NG 40 71 125/180 250/355 500 750
Maximum boost pressure
(A4VSG: measuring points see datasheet 92100)
(A4CSG: measured in M
K4
)
bar 25
Minimum boost pressure Series 30 bar 16 16 16 16 16 20
Series 33 bar
– – –
15
2)
15
2)
–
Minimum required
Control pressure
p
min
bar double boost pressure
+5bar for size 355
(mea
sured in M
1
, M
ABP
or P)
Control stroke
s
max
mm 14.2 17.1 20.7 25.9 32.6 37
Control area
A
cm
2
3.9 6.4 9 14.4 18.8 28.5
Control volume
V
S max
cm
3
5.5 11 18.7 37.3 61.4 105
Actuating time for EP without pressure
controller
1)
and 200bar high pressure
approx.
t
min
s 0.08 0.09 0.10 0.3 0.4 0.7
Repeat accuracy
<2% of V
g max
Control loop performance hysteresis
5 to 7% of V
g max
Weight of the valve parts kg 0.677 0.677 1.050 1.050
Maximum characteristic shift
at90°inclination
mA 38 38 59 59
▼ Characteristic curve
NG 40 and 71
1.0 0.8 0.6 0.4 0.2
0
0.2 0.4 0.6 0.8 1.0
600
200
200
600
I [mA] (solenoid a)
– +
V
g
V
g max
V
g
V
g max
I [mA] (solenoid b)
▼ Characteristic curve
NG125 to 750
1.0 0.8 0.6 0.4 0.2
0
0.2 0.4 0.6 0.8 1.0
740
280
280
740
I [mA] (solenoid a)
– +
V
g
V
g max
V
g
V
g max
I [mA] (solenoid b)
1) Swivel times with mounted pressure controller are longer and
depend on the system settings on the customer side
2) With neutral position controls, the boost pressure must not fall
below 15bar.
Bosch Rexroth AG, RE 92084/2021-04-21
6 Electro-hydraulic control | with proportional solenoid EP
Technical data, solenoid for A4VSG and A4CSG
Technical data, solenoid for A4VSG and A4CSG
The axial piston units are equipped with the following solenoids with manual override.
Size 40/71 125 to 355
500 to 1000
Device connector DIN EN ISO 175301-803-A002M DIN EN ISO 175301-803-A002M
Resistance R
20
Ω 22.7 20.2
Rated current I
nom
A DC 0.6 0.8
Control current Start of control
at V
g min
200 mA 280 mA
End of control
at V
gmax
600 mA 740 mA
Max. flow control range I
G
= 1.1 x I
nom
A 0.77 1.05
Rated voltage U
R
V 24 24
Dither frequency for PWM signal 100 to 200 Hz
(Recommendation 100 Hz)
100 t
o 200 Hz
(Rec
ommendation 100 Hz)
Insulating material class H (ϑ
max
180°C) H (ϑ
max
180°C)
Duty cycle ED S1 (100%) S1 (100%)
Ambient temperature ϑ
A
°C On request On request
Type of protection according to
DIN VDE 0470/EN 60529
IP65 IP65
Manual o
v
erride Pressure plate in rubber bellow
Force for the actuation of manual override
180 N for V
g max
180 N for V
g max
Calculation of resistance
at ϑ> 20°C
R
W
=
R
20
x (235+ϑ)
255
Notice
Detailed dimensions and technical data of the respective products
can be found in the datasheets listed on page 1.
RE 92084/2021-04-21, Bosch Rexroth AG
7 Electro-hydraulic control | with proportional solenoid EP
Circuit diagrams EP A4VSG NG40 to 355
Circuit diagrams EP A4VSG NG40 to 355
▶ Size 40 to 71
1)
Example: A4VSG71EP/11R-XXB10H020N
B A
M
B
E
P
K
2
K
3
S
1
B
2
R(L)
T
U
1
3
2
M
A
b
a
▶ Size 125 to 355
1)
Example: A4VSG125EP/30R-XXB10N000N
1
2
PU M
R(L)
TK
2
K
3
E
b
a
M
A
M
B
B A
1 Pump with hydraulic control device
2 Proportional valve
3 Boost pump
▶ Sizes 40 to 180
1)
Example: A4VSG125EP/30R-XXB10H024F
M
A1
M
1
AM
B1
B
K
2
K
3
S
R(L)
T
U
M
E
X
B1
T
3
M
A2
M
K4
M
E3
X
A1
M
B2
K
4
K
1
a b
1
2
3
4
1 Pump with hydraulic control device
2 Proportional valve
3 Boost pump
4 Flush and pressure relief valve block SDVB 16
1) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
Bosch Rexroth AG, RE 92084/2021-04-21
8 Electro-hydraulic control | with proportional solenoid EP
Circuit diagrams EP A4VSG NG500 to 1000
Circuit diagrams EP A4VSG NG500 to 1000
▶ Size 500
1)
Example: A4VSG500EP/30R-XXH10XXX0N
1
2
M
A
M
B
E
M
2
U
R(L)TK
3
K
2
AB
P
M
1
a
b
1 Pump with hydraulic control device
2 Proportional valve
▶ Size 1000
1)
Example: A4VSG1000EP/30R-XXH10XXX9N
1
2
3
B A
M
A2
M
B2
M
Sp
K
1
M
A1
M
B1
E
M
2
P
M
1
U
R(L)TK
3
K
2
a
b
1 Pump with hydraulic control device
2 Proportional valve
3 Flush and pressure relief valve block SDVB
1) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
RE 92084/2021-04-21, Bosch Rexroth AG
9 Electro-hydraulic control | with proportional solenoid EP
Dimensions EP A4VSG NG40 to 180
Dimensions [mm]
Dimensions EP A4VSG NG40 to 180
▶ Sizes 40 to 180
3)
Example: A4VSG125EP/30R-XXB10N00
15°15°
0
U
K
P
P
E
E
M
B
A
L
R
D1 D2
D8
D9
D10
D4
D3
D5
D6
D7
Solenoid A
Solenoid B
Size D1 D2 D3 D4 D5 D6 D7 D8 D9 D10
40 175 175 97 57.5 83 89 144 134 195 25
71 175 175 101.5 57.5 94 80 166 152 210 25
125 252 279 123.5 67 47.5 102 203 202 245.4 35
180 252 279 157.5 62 47.5 102 203 202 244 29
Ports Standard Size
p
max
[bar]
1)
State
2)
M Measuring port DIN 3852
4)
M14 × 1.5; 12 deep
400
X
P Control pressure DIN 3853 form W S8
See table on page5.
O
E Boost pressure supply (NG 40 to 71) DIN 3852
4)
M18 × 1.5; 12 deep O
Boost pressure supply (NG 125 to 180) M22 × 1.5; 14 deep O
For dimensions with flushing and pressure relief valve block
SDVB 16, see datasheets 95534 and 92100
1) Depending on the application, momentary pressure peaks can
occur. Keep this inmind when selecting measuring devices and
fittings.
2) O=Must be connected (plugged on delivery)
X=Plugged (in normal operation)
3) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
4) The countersink may be deeper than specified in the standard.
Bosch Rexroth AG, RE 92084/2021-04-21
10 Electro-hydraulic control | with proportional solenoid EP
Dimensions EP A4VSG NG250 to 500
Dimensions [mm]
Dimensions EP A4VSG NG250 to 500
▶ Size 250 to 500
3)
Example: A4VSG250EP/3xR-XXB10N00
E
M
B
A
P
D8
E
D9
D1 D2
D4
D3
D5
D6
D7
L
R
15 ~15 ~
0
U
K
Solenoid A
Solenoid B
Size D1 D2 D3 D4 D5 D6 D7 D8 D9
250 252 279 157.5 71 62.5 138 248 299.5 40
355 252 279 178 71 62.5 145 248 297.5 33.5
500 On request
Ports Standard Size
p
max
[bar]
State
2)
M Measuring port DIN 3852
4)
M14 × 1.5; 12 deep
400
X
P Control pressure (NG 250 to 355) DIN 3853 form W S12
See table on page5.
O
E Boost pressure supply NG 250 to 355 DIN 3852 M33 × 2; 18 deep O
For dimensions with flushing and pressure relief valve block
SDVB 16, see datasheets 95534 and 92100
1) Depending on the application, momentary pressure peaks can
occur. Keep this inmind when selecting measuring devices and
fittings.
2) O=Must be connected (plugged on delivery)
X=Plugged (in normal operation)
3) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
4) The countersink may be deeper than specified in the standard.
RE 92084/2021-04-21, Bosch Rexroth AG
11 Electro-hydraulic control | with proportional solenoid EP
Dimensions EP A4VSG NG750 to 1000
Dimensions EP A4VSG NG750 to 1000
▶ Size 750 to 1000
3)
Example: A4VSG750EP/30R-XXB10N00
D8
D9
E
D10
D1 D2
D4
D5
D6
D7
D3
L
R
B
A
P
15°
15° 0
P
M
2
M
1
Solenoid A
Solenoid B
Size D1 D2 D3 D4 D5 D6 D7 D8 D9 D10
750 315 332 229 175 114 178.5 301 317 230 51
1000 On request
Ports Standard Size
p
max
[bar]
1)
State
2)
M1 Measuring port DIN 3852
4)
M18 × 1.5; 12 deep
400
X
M2 Measuring port DIN 3852
4)
M14 × 1.5; 12 deep
400
X
P Control pressure (NG 750) DIN 3852 M22 × 1.5; 32 deep
See table on page5.
O
E Boost pressure supply NG 750 DIN 3852 M48 × 2; 29 deep O
For dimensions with flushing and pressure relief valve block
SDVB for NG 1000, see datasheets 95533 and 92100
1) Depending on the application, momentary pressure peaks can
occur. Keep this inmind when selecting measuring devices and
fittings.
2) O=Must be connected (plugged on delivery)
X=Plugged (in normal operation)
3) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
4) The countersink may be deeper than specified in the standard.
Bosch Rexroth AG, RE 92084/2021-04-21
12 Electro-hydraulic control | with proportional solenoid EP
Circuit diagrams EP A4CSG NG250 to 750
1) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
Circuit diagrams EP A4CSG NG250 to 750
▶ Size 250 to 355
1)
Example: A4CSG250EP/3xR-XXB35F994N
b
a
E
2
E
1
M
S
SU
BAM
B
M
A
K
1
E
3
M
E3
M
ABP
K
4
M
K4
M
1
M
2
R(L)TK
2
K
3
1
2
1 Pump with hydraulic control device
2 Proportional valve
▶ Size 500 to 750
1)
Example: A4CSG500EP/3xR-XXH35F994N
SM
S
U R(L)TK
3
K
2
M
AB
E
2
E
1
K
4
M
K4
M
E3
E
3
a
b
BAM
B
M
A
K
1
M
1
M
2
1
2
1 Pump with hydraulic control device
2 Proportional valve
RE 92084/2021-04-21, Bosch Rexroth AG
13 Electro-hydraulic control | with proportional solenoid EP
Dimensions EP A4CSG NG250 to 750
Dimensions EP A4CSG NG250 to 750
▶ Size 250 to 355
3)
Example: A4CSG250EP/3xR-XXB35F994N
K
U
T
B
S
D1
D3
D2
R
L
R(L)
M
1
M
2
Solenoid A
Solenoid B
R(L) M
2
T
M
1
U
15°
15°0
L
R
M10x1.00M8 (x1.25)
M10x1.00
M10x1.00M8 (x1.25)
M27x2.00
M8 (x1.25)
M8 (x1.25)
M8 (x1.25)
D1
D3
D2
Solenoid A
Solenoid A
Size D1 D2 D3 Size D1 D2 D3
250 252 279 243 500 306 332 297
355 252 279 243 750 315 332 327
Ports Size Standard Size
p
max
[bar]
1)
State
2)
M1 Measuring port 250 to 355 DIN 3852
4)
M18 × 1.5; 12 deep
400
X
500 to 750 DIN 3852 M22 × 1.5; 14 deep
400
X
M2 Measuring port 250 to 355 DIN 3852
4)
M18 × 1.5; 12 deep
400
X
500 to 750 DIN 3852 M14 × 1.5; 12 deep
400
X
Overall dimensions of the A4CSG seedatasheet92105
▶ Size 500 to 750
3)
Example: A4CSG500EP/3xR-XXH35F994D
1) Depending on the application, momentary pressure peaks can
occur. Keep this inmind when selecting measuring devices and
fittings.
2) O=Must be connected (plugged on delivery)
X=Plugged (in normal operation)
3) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
4) The countersink may be deeper than specified in the standard.
Bosch Rexroth AG, RE 92084/2021-04-21
14 Electro-hydraulic control | with proportional solenoid EP
EP.. – Electro-hydraulic control with proportional solenoids and pressure controller
EP.. – Electro-hydraulic control with proportional solenoids and pressure controller
Pressure control EPA, EPB, EPD
Function
The pressure control is an additional function which
controls the displacement of the pump as soon as the set
pressure command value has been reached. If the pressure
setting at the pressure control valve is exceeded, the
pressure control valve opens and swivels the pump back
until the set pressure is reached again.
Setting range: 50 to 350bar
350bar is the standard setting, please state other values in
plain text when ordering. The setting values, however, must
be 30bar lower than the high-pressure relief valve setting
(A4CSG) since the occurring pressure peaks and
themaximum pressure are safeguarded by these.
▼ Characteristic curve
320
350
380
30 bar
0
Displacement V
g
[%]
Working pressure p
A, B
[bar]
Pressure limitation (maximum 380bar)
Pressure control
Setting on the pressure relief valve (EPA, EPB, EPD)
or remote controlled on the pressure relief valve (EPGA, EPGB, EPG)
Setting of start of opening of high-pressure relief valves
The following pressure control systems are optionally
available
▶ EPA on one side in port A
▶ EPB on one side in port B
▶ EPD on both sides in ports A and B
Notice
The spring feedback in the controller and pump control
spring centering are no safety devices.
The controller can stick in an undefined position due to
internal contamination (contaminated hydraulic fluid,
abrasion or residual contamination from system
components). As aresult, the flow in the axial piston unit
will no longer respond correctly to the operator's
specifications.
Check whether the application on your machine requires
additional safety measures to bring the driven consumer
to asafe position (immediate stop). If necessary, make
sure these are appropriately implemented.
RE 92084/2021-04-21, Bosch Rexroth AG
15 Electro-hydraulic control | with proportional solenoid EP
EPG.. – Electro-hydraulic control with proportional solenoids and remote-controlled pressure controller
EPG.. – Electro-hydraulic control with proportional solenoids and remote-controlled pressure
controller
Pressure control remote controlled
Function
The pressure control is remote controlled via the port X
A
or
X
B
. The external pressure relief valves are not included in
the scope of delivery.
Recommendation DBD 6 (RE25 402)
Themaximum line length should not exceed 2 m.
Thedifferential pressure at the pressure control valve is set
as standard to 30bar. The pilot fluid consumption is then
approx. 2 l/min.
Notice
Setting the remote controlled pressure control:
The setting value for the external pressure relief valve plus
the differential pressure value at the pressure control
valve determines the level of pressure control.
Example:
– external pressure relief valve 320bar
– differential pressure on pressure control valve 30bar
– resulting pressure control of 320 + 30 = 350bar
The following remote controlled pressure controls are
available as an option
▶ EPGA on one side in port A
▶ EPGB on one side in port B
▶ EPG on both sides in ports A and B
Bosch Rexroth AG, RE 92084/2021-04-21
16 Electro-hydraulic control | with proportional solenoid EP
Circuit diagrams EPD, EPG A4VSG NG40 to 71
Circuit diagrams EPD, EPG A4VSG NG40 to 71
▶ Size 40 to 71
1)
Example: A4VSG71EPD
B A
E
P
K
2
K
3
R(L)
T
U
b
a
M
A
M
B
2
1
3
▶ Size 40 to 71
1)
Example: A4VSG71EPG
B A
E
P
K
2
K
3
R(L)
T
U
b
a
M
A
M
B
X
A
X
B
2
1
3
not included in the
scope of delivery
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A and B
▶ Size 40 to 71
1)
Example: A4VSG71EPD/......XXX4N
E
T
3
T
1
K
1
M
A2
M
K4
M
B2
K
4
M
E
E
1
E
2
M
E3
M
2
M
1
AB
U R(L)TK
2
K
3
M
A1
M
B1
2
1
4
3
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A and B
4 Flush and pressure relief valve block SDVB 16
1) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
RE 92084/2021-04-21, Bosch Rexroth AG
17 Electro-hydraulic control | with proportional solenoid EP
Circuit diagrams EPA, EPB, EPD A4VSG NG125 to 355
Circuit diagrams EPA, EPB, EPD A4VSG NG125 to 355
▶ Size 125 to 355
1)
Example: A4VSG125EPA
M
B1
M
A1
PU M
R(L)
TK
2
K
3
E
b
a
B A
2
1
3
▶ Size 125 to 355
1)
Example: A4VSG125EPB
M
B1
M
A1
PU M
R(L)
TK
2
K
3
E
b
a
B A
2
1
3
▶ Size 125 to 355
1)
Example: A4VSG125EPD
M
B1
M
A1
PU M
R(L)
TK
2
K
3
E
b
a
B A
2
1
3
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A, B
▶ Size 125 to 180
1)
Example: A4VSG125EPD/......XXX4N
E
T
3
T
1
K
1
M
A2
M
K4
M
B2
K
4
M
E
E
1
E
2
M
E3
M
2
M
1
AB
U R(L)TK
2
K
3
M
A1
M
B1
2
1
4
3
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A and B
4 Flush and pressure relief valve block SDVB 16
1) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
Bosch Rexroth AG, RE 92084/2021-04-21
18 Electro-hydraulic control | with proportional solenoid EP
Circuit diagrams EPGA, EPGB, EPG A4VSG NG125 to 355
Circuit diagrams EPGA, EPGB, EPG A4VSG NG125 to 355
▶ Size 125 to 355
1)
Example: A4VSG125EPGA
M
B1
M
A1
PU M
R(L)
TK
2
K
3
E
b
a
B A
X
A
2
1
3
not included in the
scope of delivery
▶ Size 125 to 355
1)
Example: A4VSG125EPGB
M
B1
M
A1
PU M
R(L)
TK
2
K
3
E
b
a
B A
X
B
1
2
3
not included in the
scope of delivery
▶ Size 125 to 355
1)
Example: A4VSG125EPG
M
B1
M
A1
PU M
R(L)
TK
2
K
3
E
b
a
B A
X
A
X
B
2
1
3
not included in the
scope of delivery
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A, B
▶ Size 125 to 180
1)
Example: A4VSG125EPG/......XXX4N
E
T
3
T
1
K
1
M
A2
M
K4
M
B2
K
4
M
E
E
1
E
2
M
E3
M
2
M
1
AB
U R(L)TK
2
K
3
M
A1
M
B1
2
1
4
3
X
A
X
B
not included in the
scope of delivery
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A and B
4 Flush and pressure relief valve block SDVB 16
1) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
RE 92084/2021-04-21, Bosch Rexroth AG
19 Electro-hydraulic control | with proportional solenoid EP
Circuit diagrams EPA, EPB, EPD A4CSG NG250 to 355
Circuit diagrams EPA, EPB, EPD A4CSG NG250 to 355
▶ Size 250 to 355
1)
Example: A4CSG250EPA
2
1
3
M
S
S
b
a
U
B AM
B
M
A
K
1
M
ABP
M
E3
K
4
M
K4
M
2
M
1
R(L)
TK
2
K
3
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A
▶ Size 250 to 355
1)
Example: A4CSG250EPD
2
1
3
b
a
B AM
B
M
A
K
1
M
E3
K
4
M
K4
U
M
ABP
M
2
E
2
M
1
R(L)
TK
2
K
3
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A, B
▶ Size 250 to 355
1)
Example: A4CSG250EPB
2
1
3
M
S
S
b
a
U
B AM
B
M
A
K
1
M
E3
M
ABP
K
4
M
K4
M
2
M
1
R(L)
TK
2
K
3
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side B
1) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
Bosch Rexroth AG, RE 92084/2021-04-21
20 Electro-hydraulic control | with proportional solenoid EP
Circuit diagrams EPGA, EPGB, EPG A4CSG NG250 to 355
Circuit diagrams EPGA, EPGB, EPG A4CSG NG250 to 355
▶ Size 250 to 355
1)
Example: A4CSG250EPGA
X
A
2
1
3
M
S
S
b
a
U
B AM
B
M
A
K
1
M
ABP
M
E3
K
4
M
K4
M
2
M
1
R(L)
TK
2
K
3
not included in the
scope of delivery
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A
▶ Size 250 to 355
1)
Example: A4CSG250EPG
not included in the
scope of delivery
X
A
X
B
2
1
3
M
S
S
b
a
U
B AM
B
M
A
K
1
M
ABP
M
E3
K
4
M
K4
M
2
M
1
R(L)
TK
2
K
3
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A, B
▶ Size 250 to 355
1)
Example: A4CSG250EPGB
not included in the
scope of delivery
X
B
2
1
M
S
S
b
a
U
B AM
B
M
A
K
1
M
ABP
M
E3
K
4
M
K4
M
2
M
1
R(L)
TK
2
K
3
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side B
1) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
RE 92084/2021-04-21, Bosch Rexroth AG
21 Electro-hydraulic control | with proportional solenoid EP
Circuit diagrams EPA, EPB, EPD A4CSG NG500 to 750
Circuit diagrams EPA, EPB, EPD A4CSG NG500 to 750
▶ Size 500 to 750
1)
Example: A4CSG500EPA
M
2
M
1
a
b
K
4
M
K4
U
B AM
B
M
A
K
1
R(L)
TK
3
K
2
E
1
E
2
E
3
M
E3
M
AB
S M
S
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A
▶ Size 500 to 750
1)
Example: A4CSG500EPD
1
2
M
1
M
2
M
AB
2
K
3
R(L)
S
K T
U
S M
A
M
A
K
1
M
B
B
M
K4
K
4
M
E3
E
3
E
E
a
b
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A, B
▶ Size 500 to 750
1)
Example: A4CSG500EPB
M
2
M
1
B AM
B
M
A
K
1
K
4
M
K4
E
3
M
E3
U
R(L)
TK
3
K
2
E
1
E
2
M
AB
S M
S
a
b
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side B
1) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
Bosch Rexroth AG, RE 92084/2021-04-21
22 Electro-hydraulic control | with proportional solenoid EP
Circuit diagrams EPGA, EPGB, EPG A4CSG NG500 to 750
Circuit diagrams EPGA, EPGB, EPG A4CSG NG500 to 750
▶ Size 500 to 750
1)
On request
▶ Size 500 to 750
1)
Example: A4CSG500EPG
not included in the
scope of delivery
a
b
M
2
M
1
T
1
K
4
M
K4
E
3
M
E3
M
AB
E
2
E
1
U
B AM
B
M
A
K
1
R(L)
TK
3
K
2
S M
S
M
S
X
B
X
A
1 Pump with hydraulic control device
2 Proportional valve
3 Control valves, pressure side A, B
▶ Size 500 to 750
1)
On request
1) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
RE 92084/2021-04-21, Bosch Rexroth AG
23 Electro-hydraulic control | with proportional solenoid EP
Dimensions EPD/EPG A4VSG NG40 to 180
Dimensions [mm]
Dimensions EPD/EPG A4VSG NG40 to 180
▶ Size 40 to 71
3)
Example: A4VSG71EPG/11R-XXB10....
D1
D2
D3
D5
D6
D4
X
B
X
A
R(L)
M
1
R(L)
B
to mounting flange
D6
D1
D2
D4
D7
M
1
X
A
X
B
M
2
R(L)
B
D5
D3
R(L)
to mounting flange
to mounting flange
Size D1 D2 D3 D4 D5 D6 D7
40 175 175 229 256 203 163 –
71 175 175 245 283 249 179 –
125 252 279 207 163 192 13 203
180 252 279 207 163 192 13 203
Ports Standard Size
p
max
[bar]
1)
State
2)
XA, XB Pilot pressure port
remote controlled pressure controller
(EPGA, EPGB and EPG)
DIN 3852
4)
M14 × 1.5; 12 deep
400
O
M1 Measuring port for NG 40 to 71 DIN 3853 S8 form W
400
X
Measuring port for NG 125 to 180 DIN 3852
4)
M14 × 1.5; 12 deep
400
X
M2 Measuring port DIN 3852
4)
M14 × 1.5; 12 deep
400
X
▶ Size 125 to 180
3)
Example: A4VSG125EPG/30R-XXB10....
1) Depending on the application, momentary pressure peaks can
occur. Keep this inmind when selecting measuring devices and
fittings.
2) O=Must be connected (plugged on delivery)
X=Plugged (in normal operation)
3) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
4) The countersink may be deeper than specified in the standard.
Bosch Rexroth AG, RE 92084/2021-04-21
24 Electro-hydraulic control | with proportional solenoid EP
Dimensions EPD/EPG A4VSG and A4CSG NG250 to 750
Dimensions [mm]
Dimensions EPD/EPG A4VSG and A4CSG NG250 to 750
▶ Size 250 to 355
3)
Example: A4CSG250EPG/3xR-....
X
A
X
B
X
A
X
B
B
R(L)
M
1
M
2
R(L)
D3
D5
D4
D7
D1
D2
D6
to mounting flange
to mounting flange
to mounting flange
M10x1.00M8 (x1.25)M8 (x1.25)
M5 (x0.8) M5 (x0.8)
M5 (x0.8)M5 (x0.8)
M16 (x2)
M16 (x2)
Schl.weite: 19 mm
M36x2
S
ch
l
.we
it
e:
5
5
mm
B
R(L)
X
A
X
B
R(L)
X
A
X
B
D1
D6
D2
D6
D3
D5
D7
D4
M₁
M₂
Size D1 D2 D3 D4 D5 D6 D7
250
252 279 243 428 228 13 468
355
252 279 243 428 228 13 468
500
306 332 342 469 315 136 304
750
315 332 372 501 345 136 334
Ports Standard Size
p
max
[bar]
1)
State
2)
XA, XB Pilot pressure port
remote controlled pressure controller
(EPGA, EPGB and EPG)
DIN 3852
4)
M14 × 1.5; 12 deep
400
O
M1 Measuring port for NG 250 to 355 DIN 3852
4)
M18 × 1.5; 12 deep
400
X
Measuring port for NG 500 to 750 DIN 3852 M22 × 1.5; 14 deep
400
X
M2 Measuring port for NG 250 to 355 DIN 3852
4)
M18 × 1.5; 12 deep
400
X
Measuring port for NG 500 to 750 DIN 3852 M14 × 1.5; 12 deep
400
X
▶ Size 500 to 750
3)
Example: A4CSG500EPG/3xR-....
1) Depending on the application, momentary pressure peaks can
occur. Keep this inmind when selecting measuring devices and
fittings.
2) O=Must be connected (plugged on delivery)
X=Plugged (in normal operation)
3) Representation of clockwise rotation.
Representation of counter-clockwise rotation on request
4) The countersink may be deeper than specified in the standard.
RE 92084/2021-04-21, Bosch Rexroth AG
25 Electro-hydraulic control | with proportional solenoid EP
Connector for solenoids
Connector for solenoids
HIRSCHMANN DINEN175 301-803-A/ISO4400
Without bidirectional suppressor diode _________________ H
Type of protection according to DIN/EN 60529 ________IP65
The seal ring in the cable fitting is suitable for lines of
diameter 4.5mm to 10mm.
The plug-in connector is not included in the scope of
delivery.
This can be supplied by Bosch Rexroth on request
(material number: R902602623).
D2
D3
D4
D1
Mounting bolt M3
tightening torque:
M
A
= 0.5Nm
Cable fitting M16x1.5
tightening torque:
M
A
= 1.5 - 2.5Nm
NG D1 D2 D3 D4
40 to 71 71.5 ⌀37 50 86
125 to 1000 84 ⌀63 72 123.7
Connector on solenoid
according to DIN43650
Plug-in connector
DIN EN175301-803-A
Line screw fitting M16x1.5
12
PE
A
12
PE
A
Notice
If necessary, you can change the position of the
connector by turning the solenoid body.
The procedure can be found in operating instructions
92100-01-B and 92105-01-B.
With manual
override
Bosch Rexroth AG, RE 92084/2021-04-21
26 Electro-hydraulic control | with proportional solenoid EP
Project planning notes
Project planning notes
▶ The A4VSG and A4CSG axial piston variable pumps are
designed to be used in closed circuit.
▶ Project planning, installation and commissioning of the
axial piston units requires the involvement of skilled
personnel.
▶ Before using the axial piston unit, please read the
corresponding instruction manual completely and
thoroughly. If necessary, this can be requested from
BoschRexroth.
▶ Before finalizing your design, request abinding
installation drawing. If you need a3D installation model,
please consult the responsible contact person at
BoschRexroth.
▶ The specified data and notes contained herein must be
observed.
More information on the products can be found in the
datasheets listed on page 1.
▶ Depending on the operating conditions of the axial
piston unit (working pressure, fluid temperature),
thecharacteristic curve may shift.
▶ The characteristic curve may also shift due to the dither
frequency or control electronics.
▶ Preservation: Our axial piston units are supplied as
standard with preservation protection for amaximum of
12months. If longer preservation protection is required
(maximum 24months), please specify this in plain text
when placing your order. The preservation periods apply
under optimal storage conditions, details of which can be
found in the datasheet90312 or the instruction manual.
▶ Not all versions of the product are approved for use in
asafety function according to ISO13849. Please consult
the proper contact at BoschRexroth if you require
reliability parameters (e.g.MTTF
d
) for functional safety.
▶ Depending on the type of control used, electromagnetic
effects can be produced when using solenoids. Use of
the recommended direct current (DC) on the
electromagnet does not produce any electromagnetic
interference (EMI) nor is the electromagnet influenced
by EMI. A possible electromagnetic interference (EMI)
exists if the solenoid is supplied with modulated direct
current (e.g.PWM signal). The machine manufacturer
should conduct appropriate tests and take appropriate
measures to ensure that other components or operators
(e.g. with apacemaker) are not affected by this
potentiality.
▶ Pressure controllers are not safeguards against pressure
overload. Be sure to add apressure relief valve to the
hydraulic system.
▶ For drives that are operated for along period of time
with constant rotational speed, the natural frequency of
the hydraulic system can be stimulated by the excitation
frequency of the pump (rotational speed frequencyx9).
This can be prevented with suitably designed hydraulic
lines.
▶ Please note the details regarding the tightening torques
of port threads and other threaded joints in the
instruction manual.
▶ The ports and fastening threads are designed for the
p
max
permissible pressures of the respective ports,
seethe connection tables. The machine or system
manufacturer must ensure that the connecting elements
and lines correspond to the specified application
conditions (pressure, flow, hydraulic fluid, temperature)
with the necessary safety factors.
▶ The working ports and function ports are only intended
to accommodate hydraulic lines.
RE 92084/2021-04-21, Bosch Rexroth AG
27 Electro-hydraulic control | with proportional solenoid EP
Safety instructions
Safety instructions
▶ During and shortly after operation, there is arisk of
getting burnt on the axial piston unit and especially on
the solenoids. Take the appropriate safety measures
(e.g.by wearing protective clothing).
▶ Moving parts in control equipment (e.g.valve spools)
can, under certain circumstances, get stuck in position
as aresult of contamination (e.g.contaminated
hydraulic fluid, abrasion, or residual dirt from
components). As aresult, the hydraulic fluid flow and
the build-up of torque in the axial piston unit can no
longer respond correctly to the operator’s
specifications. Even the use of various filter elements
(external or internal flow filtration) will not rule out
afault but merely reduce the risk. The machine/system
manufacturer should test whether additional measures
are required on the machine for the relevant application
in order to bring the driven consumer into asafe
position (e.g.safe stop) and make sure any measures
are properly implemented.
Bosch Rexroth AG, RE 92084/2021-04-21
Bosch Rexroth AG
An den Kelterwiesen 14
72160 Horb a.N.
Germany
Tel. +49 7451 92-0
info.ma@boschrexroth.de
www.boschrexroth.com
©BoschRexrothAG2021. All rights reserved, also regarding any disposal,
exploitation, reproduction, editing, distribution, as well as in the event of
applications for industrial property rights. The data specified within only
serves to describe the product. No statements concerning acertain condition
orsuitability for acertain application canbederived from our information.
Theinformation given does notrelease the user from the obligation of own
judgment and verification. It must be remembered that our products are
subject to anatural process of wear and aging.
28 Electro-hydraulic control | with proportional solenoid EP