Electrical InstallationS51 and 51-1 Electrohydraulic Two-Position Controls E1, E2, E7
Revision historyTable of revisions
DateChangedRev
August 2015Converted to Danfoss layoutBA
April 2007First editionAA
211024946 • Rev BA • August 2015
Electrical InstallationS51 and 51-1 Electrohydraulic Two-Position Controls E1, E2, E7
Contents
Literature references
S51 and 51-1 Electrohydraulic Two-Position Controls E1, E2, E7 literature references...........................................4
Latest version of technical literature.........................................................................................................................................4
Theory of operation.........................................................................................................................................................................6
Series 51-1 schematic................................................................................................................................................................ 6
Series 51 schematic.................................................................................................................................................................... 7
DIN 43650 connector.................................................................................................................................................................8
AMP Junior Power Timer connector.....................................................................................................................................8
DIN 43650 connector parts list...............................................................................................................................................9
AMP connector parts list.......................................................................................................................................................... 9
11024946 • Rev BA • August 20153
Electrical InstallationS51 and 51-1 Electrohydraulic Two-Position Controls E1, E2, E7
Literature references
S51 and 51-1 Electrohydraulic Two-Position Controls E1, E2, E7 literature references
Literature titleDescriptionLiterature number
S51 and 51-1 Bent Axis Variable Displacement Motors
Technical Information
S51 L Proportional Controls Function Block User ManualCompliant function block
Latest version of technical literature
Danfoss product literature is online at: http://powersolutions.danfoss.com/literature/
Complete product electrical
and mechanical
specifications
set-up information
520L0440
11022922
411024946 • Rev BA • August 2015
5 1
R G L F M N J S T W Y P K V Z
5 1
R G L F M N J S T W Y P K V Z X
Electrical Installation
Product overview
Product image
Nomenclature
S51 model code
S51 and 51-1 Electrohydraulic Two-Position Controls E1, E2, E7
S51 and 51-1 Electrohydraulic Two-Position Controls E1, E2, E7
S51-1 model code
Code M options
MDescription
E1Electrohydraulic two-position control, 12 Vdc, DIN Connector
E2Electrohydraulic two-position control, 24 Vdc, DIN Connector
Only certain control options for the S51 and S51-1 motor utilize the Electrohydraulic Two-Position
Control. Please refer to the motor’s nomenclature to determine if the motor is equipped with the proper
option. The nomenclature can be found on the motor’s nametag.
11024946 • Rev BA • August 20155
Minimum
12 Vdc/
24 Vdc
Maximum
Displacement
Control
voltage
W
n
min.
disp.
T3
T2
M4
B
M3
M5
L1
N
L2
A
P001 780E
Electrical InstallationS51 and 51-1 Electrohydraulic Two-Position Controls E1, E2, E7
Product overview
Theory of operation
Displacement can be changed electrohydraulically under load from maximum displacement to minimum
displacement and vice versa, by using a built-in solenoid valve.
•
Solenoid off = maximum displacement
•
Solenoid on = minimum displacement
Electrohydraulic two-position control operation
Warning
Hydraulic schematics
Unintended vehicle or machine movement hazard. The loss of hydrostatic drive line power, in any mode
of operation (forward, neutral, or reverse) may cause the system to lose hydrostatic braking capacity. You
must provide a braking system, redundant to the hydrostatic transmission, sufficient to stop and hold the
vehicle or machine in the event of hydrostatic drive power loss.
Series 51-1 schematic
Circuit diagram – motor with EH two-position control E1B1, E2B1,
E7B1
Ports:
A, B = Main pressure lines
L1, L2 = Drain lines
M3, M4 = Servo pressure
M5 = Gauge port servo supply
pressure internal
T2, T3 = Optional orifices
N = Speed sensor
611024946 • Rev BA • August 2015
n
max.
disp.
T3
T2
T1
T7 T8
P100 180E
B
M8
M7
M2
L1
M1
N
M3
M4
L2
A
M5
Electrical InstallationS51 and 51-1 Electrohydraulic Two-Position Controls E1, E2, E7
Product overview
Series 51 schematic
Electrical specifications
Circuit diagram – motor with control options: E1A5, E2A5
Ports:
A, B = Main pressure lines
L1, L2 = Drain lines
M1, M2 = Gauge port for A and B
M3, M4 = Gauge port servo pressure
M5 = Gauge port servo supply pressure,
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