1/8
Float switch
with two switching contacts and one
temperature contact
Type ABZMS-35
Component series 1X
RE 50212/04.07
Replaces: AB 31-35
Table of contents Features
– Float switches are switching devices, which are operated by
a float that is moved by a fluid. They are used for the regula-
tion of fluid levels in reservoirs of type ABSKG ... small power
units, sizes 10; 20; 40 and 60, according to data sheet
RE 51013.
– Two firmly set reed contacts (normally closed and normally
open), which are switched by permanent magnets integrated
in the float, are provided in the sliding tubes.
– For monitoring the max. hydraulic fluid temperature, firmly set
temperature contacts (option) are installed.
Contents Page
Features, symbol 1
Ordering code 2
Standard types 2, 3
Technical data 3, 4
Plug-in connectors 4
Float switch with two switching contacts:
• Unit dimensions 5
• Contact assignment 5
• Function of the level switch 5
Float switch with two switching contacts and one temperature
contact:
• Unit dimensions 6
• Contact assignment 6
• Function of the level switch and temperature contact 6
Spare parts 7
Assignment to reservoirs 7
Installation notes 8
Use in potentially explosive atmospheres (ATEX) 8
Normative cross-reference 8
Symbol
With two switching contacts
With two switching contacts
and one temperature contact
Table of contents
1
Features
1
Symbol
1
Ordering code
2
Standard types: Float switches with two switching contacts
2
Standard types: Float switches with two switching contacts and
one temperature contact
3
Technical data (for applications outside these parameters, please
contact us!)
3
Technical data (for applications outside these parameters, please
contact us!)
4
Plug-in connectors (nominal dimensions in mm [inch]) – for
detailed information, see RE 08006 4
Float switches with two switching contacts
5
Float switches with two switching contacts and temperature
contact
6
Spare parts
7
Assignment to reservoirs
7
Installation notes
8
Use in potentially explosive atmospheres according to Directive
94/9/EC (ATEX)
8
Normative cross-reference
8
2/8 Bosch Rexroth AG Hydraulics
ABZMS-35 RE 50212/04.07
Ordering code
Power unit accessories
Measuring instruments
= ABZM
Float switch
= S
Version = 35
Component series 10 to 19
= 1X
(10 to 19: unchanged installation and connection dimensions)
Minimum contact
Switching point L1 in mm, e.g. 120 mm
= 120
Normally closed contact
= F
Maximum contact
Switching point L2 in mm, e.g. 50 mm
= 050
2)
Electrical connection
K24 =
Male connector 04-pin M12x1
K14 = Male connector 04-pin
(3+PE) DIN EN 175301-803
(float switch without
temperature contact)
K6 =
Male connector 07-pin
(6+PE) DIN EN 175201-804
(float switch with
temperature contact)
Temperature contact
No code =
Without switching contact
T63F =
1)
Switching contact n/c at 63 °C
T70F =
Switching contact n/c at
70 °C
T80F =
1)
Switching contact n/c at
80 °C
F =
Normally closed
S = Normally open
ABZM
S
35 1X
F
Order example:
– Float switch with connection thread M20x1.5, with 2 firmly set switching
contacts,
– switching point L1 = 90 mm normally closed,
– switching point L2 = 30 mm, normally open
– Male connector K24 for female connector Z24 (M12x1)
ABZMS-35-1X/090F030S-K24 Material no. R901057912
Standard types: Float switches with two switching contacts
Selection for ABSKG ...
Switching point in mm [inch]
Type Material number
L1
L2
ABSKG 10 ...
90 [3.54] 30 [1.18]
ABZMS-35-1X/090F030S-K24 R901057912
ABSKG 20 ...
120
[4.72]
50 [1.97]
ABZMS-35-1X/120F050S-K24 R901057913
ABSKG 40 ... and 60 ...
165
[6.50] 85 [3.35]
ABZMS-35-1X/165F085S-K24 R901057914
1)
Only on enquiry
2)
Plug-in connectors are not included in the scope of supply and must be
ordered separately, if required (see pag 4).
Float switches with min./max. switching points
Float switches with min./max. early warning switching points
Selection for ABSKG ...
Switching point in mm [inch]
Type Material number
L1 L2
ABSKG 10 ...
90 [3.54] 60 [2.36]
ABZMS-35-1X/090F060S-K24 R901088809
ABSKG 20 ...
120
[4.72] 90 [3.54]
ABZMS-35-1X/120F090S-K24 R901088810
ABSKG 40 ... and 60 ...
165
[6.50] 135 [5.32]
ABZMS-35-1X/165F135S-K24 R901088811
For further standard types,
see page 3
The switching points of the float switches are matched to small
power units of type ABSKG ... according to data sheet RE 51013.
Hydraulics Bosch Rexroth AG
RE 50212/04.07
ABZMS-35
3/8
Standard types: Float switches with two switching contacts and one temperature contact
Selection for ABSKG ...
Switching point in mm [inch]
Type Material number
L1
L2
ABSKG 10 ...
90 [3.54]
30 [1.18]
ABZMS-35-1X /090F030S-T70F-K24 R901057916
ABSKG 20 ...
120
[4.72]
50 [1.97]
ABZMS-35-1X /120F050S-T70F-K24 R901057918
ABSKG 40 ... and 60 ...
165
[6.50]
85 [3.35]
ABZMS-35-1X /165F085S-T70F-K24 R901057920
Float switches with min./max. switching points and temperature contact
Float switches with min. early warning switching points and temperature contact
Selection for ABSKG ...
Switching point in mm [inch]
Type Material number
L1
L2
ABSKG 10 ...
90 [3.54]
60 [2.36]
ABZMS-35-1X /090F060S-T70F-K24 R901088812
ABSKG 20 ...
120
[4.72]
90 [3.54]
ABZMS-35-1X /120F090S-T70F-K24 R901088813
ABSKG 40 ... and 60 ...
165
[6.50]
135 [5.32]
ABZMS-35-1X /165F135S-T70F-K24 R901088814
Technical data (for applications outside these parameters, please contact us!)
General
Temperature range
°C [°F] 0 to 90 [32 to 194]
Installation orientation Vertical ±10 °
Ambient temperature range °C [°F]
–30 to +50 [-22 to +122]
Material – Tube and thermostat
CU alloy
– Float
PUR rigid foam
– Flange
CU alloy
Seal material
NBR seals
Maximum switching point L1
mm [inch]
400 [15.75]
Weight with L1 = 300 mm
kg [Ibs]
0.16 [0.35]
Hydraulic
Maximum operating pressure bar [psi]
1 [14.5]
Hydraulic fluid
– Specific weight g/cm
3
> 0.7
– Resistance
• Mineral oils Mineral oil HLP to DIN 51524
Resistant
• Flame-retardant hydraulic fluids Emulsions HFA-E to DIN 24320
Not
resistant
Watery solutions HFC
to
VDMA 24317
Phosphate esters HFD-R
Organic esters HFD-U
• Fast bio-degradable hydraulic fluids
Triglycerides (rape seed oil) HETG
to
VDMA 24568
Synthetic esters HEES
Polyglycols HEPG
Electrical
Type of protection to DIN EN 60529 IP 65
Plug-in connection M12x1; 4-pin (material: metal)
DIN EN 175301-803 / DIN EN 175201-804
53
34,2
1
M16 x 1,5
[2.09]
[1.35]
48
1
Pg11
66
[2.6]
[1.89]
54
M12x1
Ø19,6
[2.13]
[ 0.77]
M12 x 1
41,5
[1.63]
4/8 Bosch Rexroth AG Hydraulics
ABZMS-35 RE 50212/04.07
Technical data (for applications outside these parameters, please contact us!)
Reed contacts of float switches with K24 connection for plug-in connector M12x1; 4-pin
Switching voltage range
VDC 10 to 50
Max. switching current
A
0.5
Max. switching power
W 10
Reed contacts of float switches with K14 connection to DIN EN 175301-803 / K6 to DIN EN 175201-804
Switching voltage range
VAC 10 to 230
Max. switching current
A
0.5
Max. switching power
W/VA 10/30
In the case of inductive and capacitive loads, suppressor circuits must be provided (diode, RC-element, varistor).
Temperature contacts of float switches with
K14 connection to DIN 175301-803 / K6 to DIN EN 175201-804
Switching voltage range VAC 10 to 230
Max. switching current
A 2
Max. number of switching cycles 10 000
Response tolerance K ± 5
Hysteresis range K 2 to 10
Max. temperature change rate K/min
1
Temperature contacts of float switches with K24 connection for plug-in connector M12x1; 4-pin
Switching voltage range
VDC 10 to 50
Max. switching current
A
2
Max. number of switching cycles 10 000
Response tolerance
K
± 4
Hysteresis range
K 2 to 10
Max. temperature change rate
K/min
1
Plug-in connectors (nominal dimensions in mm [inch]) – for detailed information, see RE 08006
Female connector for K14 male connector
to DIN EN 175301-803
Female connector for K6 male connector
to DIN EN 175201-804
Cable socket for plug K24
Designation Material no.
LEITUNGSDOSE 4P Z14 M SW SPEZ R901017012
Designation Material no.
LEITUNGSDOSE 7P Z6 N6RFFK R900002803
Designation Material no.
LEITUNGSDOSE 4P Z24 SPEZ R900031155
1 Mounting screw M3, tightening torque M
T
= 0.5 Nm
Cable socket for plug K24 with moulded-on PVC cable,
3 m long
Designation Material no.
LEITUNGSDOSE 4P Z24M12X1 +3MSPEZ
R900064381
M20x1,5
L = L1 + 35
+4
2
6
7
SW27
3
4
18
L2
≥
30
~
50
≥
30
L1
≥
60
35
+4
[ 0.71]
[1.06 A/F]
[~1.97]
[1.18]
[1.18]
[2.36]
[1.38
+0.16
]
[1.38
+0.16
]
~
72
14
[~2.84]
[0.55]
1
2 3
PE
L1
L2
1
2 4
3
L1
L2
M20x1,5
L = L1 + 35
+4
1
5
7
SW27
3
4
18
L2
≥
30
~
34
≥
30
L1
≥
60
35
+4
~
85
14
[ 0.71]
[1.06 A/F]
[~
3.35]
[
~1.34]
[0.55]
[1.18]
[1.18]
[2.36]
[1.38
+0.16
]
[1.38
+0.16
]
Hydraulics Bosch Rexroth AG
RE 50212/04.07 ABZMS-35
5/8
Float switches with two switching contacts
Unit dimensions (nominal dimensions in mm[inch])
Plug-in connection M12x1, max. 50 VDC
Plug-in connection DIN EN 175301-803, max. 230 VAC
1
For female connector for plug-in connections K24 (M12x1),
see page 4
2
For female connector for plug-in connections K14, see page 4
3
Profiled seal M20x1.5 RNI 18104
Contact assignment
Switching function with plug-in connection M12x1
Switching function with plug-in connection DIN EN 175301-803
4
Switching point
5
Male connector “K24“ 04pin12x1
6
Male connector “K14“ 04-pin (3+PE) DIN EN 175301-803
7
Nameplate
Function of level switch
When the float reaches the switching points while the oil level is falling, the contacts are operated magnetically. The switching po-
sitions of the contacts are maintained until the float passes the switching points again due to a rising oil level. Switching point L1
is a normally closed contact, the contact function of switching point L2 is optionally a normally closed or normally open contact.
L1 = normally closed contact at min.
L2 = normally closed or normally open contact as early warning
1
2 4
3
L1
X1:
X2:
1
2
4
3
L2
1
2 3
PE
L1
L2
4
5
6
M20x1,5
L = L1 + 50
+10
1
5
7
SW27
3
4
18
L2
≥
30
~
50
≥
30
L1
≥
60
50
+10
~
100
50
-10
8
14
[ 0.71]
[1.06 A/F]
[~3.94]
[
~1.97]
[0.55]
[1.18]
[1.18]
[2.36]
[1.97
+0.39
]
[1.97
+0.39
]
[ 1.97
-0.39
]
M20x1,5
L = L1 + 70
2
6
7
SW27
3
4
18
~
50
≥
30
L1
≥
60
70
18
9
~
82
L2
≥
30
14
[ 0.71]
[1.06 A/F]
[~3.23]
[~1.97]
[0.55]
[1.18]
[2.76]
[1.18]
[2.76]
[2.36]
[ 0.71]
6/8 Bosch Rexroth AG Hydraulics
ABZMS-35
RE 50212/04.07
Float switches with two switching contacts and temperature contact
Unit dimensions (nominal dimensions in mm[inch])
Plug-in connection M12x1, max. 50 VDC
Plug-in connection DIN EN 175201-804, max. 230 VAC
1
2x female connector for plug-in connections K24 (M12x1),
see page 4
2
Female connector for plug-in connections K6, see page 4
3
Profiled seal M20x1.5 RNI 18104
4
Switching point
Contact assignment
Switching function with plug-in connection M12x1
Switching function with plug-in connection DIN EN 175201-804
5
2x male connector “K24“ 04-pin12x1
6
Male connector “K6“ 07-pin (6+PE) DIN EN 175201-804
7
Nameplate
8
Temperature contact in sliding tube
9
Temperature contact
Level switch function
When the float reaches the switching points while the oil level is falling, the contacts are operated magnetically. The switching po-
sitions of the contacts are maintained until the float passes the switching points again due to a rising oil level. Switching point L1
is a normally closed contact, the contact function of switching point L2 is optionally a normally closed or normally open contact.
L1 =
normally closed at min.
L2 = normally open or
normally closed as early
warning
ϑ = normally closed at
max. temperature
Temperature contact function
A bimetal plate, which is influenced by temperature, switches when a firmly set response temperature is reached. The temperature
contact is not suitable for temperature controlling, but merely for a shutdown function.
M20x1,5
L2
L1
P
R
1
max.
M20x1,5
L2
L1
P
R
1
max.
M20x1,5
L2
L1
P
R
1
max.
M20x1,5
L2
L1
P
R
1
max.
Hydraulics Bosch Rexroth AG
RE 50212/04.07
ABZMS-35
7/8
Spare parts
Float switch
ABZMS-35-1X/...
Reservoir
capacity
(RE 51013)
DN
Max.
oil volume
in litres [US gal]
Volume
fluctuation
P
in litres [US gal]
Residual
volume
R
in litres [US gal]
Switching
point
L1
in mm [inch]
Switching
point
L2
in mm [inch]
090F030S-K24
10
9.6 [2.54]
3.8 [0.26] 5.8 [1.53]
90 [3.54] 30 [1.18]
120F050S-K24
20 18.0 [4.76] 6.8 [1.8] 11.2 [2.96]
120 [4.72] 50 [1.97]
165F085S-K24
40 33.0 [8.72]
12.2 [3.22] 20.8 [5.49]
165 [6.50]
85 [3.35]
165F085S-K24
60 54.0 [14.27] 17.0 [4.5] 37.0 [9.77]
165 [6.50] 85 [3.35]
– When ordering spare parts for the float switch, indicate the
complete type code.
– Profiled seal M20x1.5 NBR Material no.
R900012471
Assignment to reservoirs
Float switches with min./max. switching points
Reservoir DN 10 and 20
Reservoir DN 40 and 60
Float switches with min. early warning switching points
Reservoir DN 10 and 20
Reservoir DN 40 and 60
1
Maximum oil level
1
Maximum oil level
Float switch
ABZMS-35-1X/...
Reservoir
capacity
(RE 51013)
DN
Max.
oil volume
in litres [US gal]
Volume
fluctuation
P
in litres [US gal]
Residual
volume
R
in litres [US gal]
Switching
point
L1
in mm [inch]
Switching
point
L2
in mm [inch]
090F060S-K24
10
9.6 [2.54] 2.0 [0.53] 7.6 [2.0]
90 [3.54] 60 [2.36]
120F090S-K24
20 18.0 [4.76] 4.0 [1.06] 14.0 [3.7]
120 [4.72] 90 [3.54]
165F135S-K24
40 33.0 [8.72] 8.0 [2.11] 25.0 [6.6]
165 [6.50] 135 [5.32]
165F135S-K24
60 54.0 [14.27] 11.0 [2.91] 43.0 [11.34]
165 [6.50] 135 [5.32]
2
1
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
Fax +49 (0) 93 52 / 18-23 58
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specifications and other information
set forth in it, are the exclusive property of Bosch Rexroth AG. It may not
be reproduced or given to third parties without its consent.
The data specified above only serve to describe the product. No state-
ments 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.
8/8 Bosch Rexroth AG Hydraulics
ABZMS-35
RE 50212/04.07
Installation notes
1
Cable
2
Isolating relay
–
Vertical installation according to technical data on page 3
–
Avoid flows
– Do not expose switches to strong impacts and excessive bending.
–
Avoid external magnetic fields. These could impair the function of the reed contacts.
Electrical connections:
–
Electrical connections may only be established by specialist personnel
– Tighten circular plug-in connectors M12x1 and female connectors after their connection
– Plug circular plug-in connectors M12x1 and female connectors only when disconnected from the power supply
–
Do not overload contacts (see technical data)
–
In the case of inductive loads, provide suppressor circuit!
According to DIN EN 50020 float switches are simple electrical apparatus, which are not provided with voltage sources.
The electrical components consist of reed contacts, bimetal thermostats, plug-in connections and terminals.
The equipment complies with construction regulations according to DIN EN 60079-0 and DIN EN 50020.
According to DIN EN 60079-14 these simple, electrical apparatus may be used in intrinsically safe electric circuits [EEx ib] in sys
-
tems for equipment class II, category 2G (Zone 1) and category 3G (Zone 2) without marking and certification.
The apparatus are assigned to category ib and temperature class T6.
Use in potentially explosive atmospheres according to Directive 94/9/EC (ATEX)
Intrinsically safe, electrical equipment in
potentially explosive
atmosphere (zone 1 and 2)
Associated electrical
equipment in safe zone
Normative cross-reference
DIN EN 50020 Electrical apparatus for potentially explosive
atmospheres - intrinsic safety “i“;
German version of EN 50020:2002
DIN EN 60079-0
Electrical apparatus for explosive gas
atmospheres - Part 0: General requirements
(IEC 60079-0:2004);
German version of EN 60079-0:2004
DIN EN 60079-14 Electrical apparatus for explosive gas
atmospheres - Part 14: Electrical installa-
tions in hazardous areas (other than mines)
(IEC 60079-14:2002); German version of
EN 60079-14:2003
DIN EN 175201-804
Detail specification - round connectors -
circular contacts, size diameter 1.6 mm;
threaded coupling; German version of
EN 175201-804:1999
DIN EN 175301-803
Detail specification: Rectangular connectors
- flat contacts 0.8 mm thickness - locking
screw not detachable;
German version EN 175301-803:1999
