MAKING MODERN LIVING POSSIBLE
Electrical Installation
Series 51 Motors
Electrohydraulic Proportional
Control D7, D8, DA, DC
powersolutions.danfoss.com
Electrical Installation S51 Electrohydraulic Proportional Control D7, D8, DA, DC
Revision history Table of revisions
Date Changed Rev
August 2015 Corrections to layout only CA
July 2015 Converted to Danfoss layout BA
April 2007 First edition AA
2 11024996 • Rev CA • August 2015
Electrical Installation S51 Electrohydraulic Proportional Control D7, D8, DA, DC
Contents
Literature references
S51 electrohydraulic proportional control D7, D8, DA, DC literature references......................................................4
Latest version of technical literature.........................................................................................................................................4
Product overview
Product image................................................................................................................................................................................... 5
Nomenclature....................................................................................................................................................................................5
Theory of operation.........................................................................................................................................................................6
Proportional displacement control...................................................................................................................................... 6
PCOR................................................................................................................................................................................................ 6
D7M1, D8M1................................................................................................................................................................................. 6
DAM4, DCM6.................................................................................................................................................................................6
Control operation D7M1, D8M1............................................................................................................................................ 6
Hydraulic schematics...................................................................................................................................................................... 7
Electrical specifications.................................................................................................................................................................. 8
Electrical installation
Pinout....................................................................................................................................................................................................9
AMP Junior Power Timer connector.....................................................................................................................................9
Pin compatibility...............................................................................................................................................................................9
Pressure compensator logic.......................................................................................................................................................10
Hydraulic brake pressure defeat......................................................................................................................................... 10
Electric brake pressure defeat..............................................................................................................................................10
Mating connector.......................................................................................................................................................................... 10
AMP connector parts list........................................................................................................................................................10
11024996 • Rev CA • August 2015 3
Electrical Installation S51 Electrohydraulic Proportional Control D7, D8, DA, DC
Literature references
S51 electrohydraulic proportional control D7, D8, DA, DC literature references
Literature title Description Literature number
S51 and 51-1 Bent Axis Variable Displacement Motors
Technical Information
S51 D Proportional Controls Function Block User Manual Compliant function block
On/Off Functions Function Block User Manual Compliant 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
set-up information
520L0440
11022921
11022918
4 11024996 • Rev CA • August 2015
5 1
R G L F M N J S T W Y P K V Z
Electrical Installation
Product overview
Product image
Nomenclature
S51 Electrohydraulic Proportional Control D7, D8, DA, DC
S51 electrohydraulic proportional control D7, D8, DA, DC
Code M and N options
M Description N Description
D7 Electrohydraulic proportional control, 12
Vdc
D8 Electrohydraulic proportional control, 24
Vdc
DA Electrohydraulic proportional control, 24
Vdc, in combination with EBPD
DC Electrohydraulic proportional control, 12
Vdc, in combination with EBPD
M1 Hydraulic brake pressure defeat
M4 Electric brake pressure defeat (EBPD), 24 Vdc
M6 Electric brake pressure defeat (EBPD), 12 Vdc
Only certain control options for the S51 motor utilize the Electrohydraulic Proportional Control. The
combination of the M and N modules define the motor control's functionality. Please refer to the motor's
nomenclature to determine if the motor is equipped with the proper options. The nomenclature can be
found on the motor's nametag.
11024996 • Rev CA • August 2015 5
Ramp
(ratio 5:1)
min
max
start-current
end-current
320 640
594
D8M1 D7M1
1188
Displacement
Electrohydr.
prop. control
PCOR start
setting range
Pressure compensator
override
370 bar
[5370 psi]
130 bar
[1890 psi]
Ramp < 10 bar
[145 psi]
Control current (mA)
P001 873E
Electrical Installation
Product overview
Theory of operation
S51 Electrohydraulic Proportional Control D7, D8, DA, DC
Proportional displacement control
Displacement can be changed electrohydraulically under load in response to an electrical signal from
minimum displacement to maximum displacement and vice versa. The displacement changes
proportional to the electrical signal.
Solenoid not energized = maximum displacement
•
Solenoid energized = minimum displacement
•
PCOR
The control can be overridden by Pressure Compensator Override (PCOR) using high loop pressure. When
the PCOR activates, the motor displacement increases toward maximum. Pressure ramp from PCOR start
pressure (with motor at minimum displacement) until maximum displacement is reached is less than 10
bar [145 psi]. This ensures optimal power utilization throughout the entire displacement range of the
motor. PCOR start pressure is adjustable from 110 to 370 bar [1600 to 5370 psi].
D7M1, D8M1
Pressure compensator configuration: D7M1, D8M1 with hydraulic brake pressure defeat.
A shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction
(when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration
while the vehicle/machine is slowing down. The shuttle valve must be controlled by a 2-line external
signal, based on direction of motor rotation, based on the following table. Pressure compensator
override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic
proportional controls or automotive controls.
DAM4, DCM6
Pressure compensator configuration: DAM4 and DCM6 with electric brake pressure defeat.
A solenoid-switched valve ahead of the pressure compensator prevents operation in the deceleration
direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled
deceleration while the vehicle/machine is slowing down. The solenoid valve must be controlled by an
external electric signal, based on direction of motor rotation.
Control operation D7M1, D8M1
6 11024996 • Rev CA • August 2015
W
n
T4
T6
T2
T3
T1
T7 T8
U7
max.
disp.
B
XB
XA
M7
A
L2
M4 M3
N
M1
L1
M2
(M5)
X3
P001 869E
Electrical Installation S51 Electrohydraulic Proportional Control D7, D8, DA, DC
Product overview
Warning
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.
Hydraulic schematics
Motor with Electrohydraulic Proportional Control D7M1, D8M1 with Pressure Compensator (PCOR) and
Hydraulic Brake Pressure Defeat
Ports:
A, B Main pressure lines M7 Gage port control pressure
L1, L2 Drain lines XA, XB Control pressure ports, hydraulic brake
pressure defeat
M1, M2 Gage port A and B T1, T2, T3,
Optional orifices
T4, T6, T7,
T8, U7
M3, M4 Gage port servo pressure N Speed sensor
X3 (M5) Servo pressure supply
11024996 • Rev CA • August 2015 7
n
T2
T3
T1
T7 T8
Vg
Maximum
B
U5
A
L2
M4 M3
N
M1
L1
M2
X3 (M5)
2444
A1
B1
U7T5
M7
Electrical Installation S51 Electrohydraulic Proportional Control D7, D8, DA, DC
Product overview
Electrohydraulic Proportional Control with Pressure Compensator Override to Maximum Angle Electrical Brake
Pressure Defeat
Electrical specifications
Ports:
A, B Main pressure lines X3 (M5) Servo pressure supply
L1, L2 Drain lines M7 Gage port control pressure
M1, M2 Gage port main pressure, ports A and B N Speed sensor
M3, M4 Gage port servo pressure
Electrohydraulic proportional solenoid
M-option D7, DC D8, DA
Voltage
Start Current
End Current
Maximum Current
Nominal Resistance at 20°C [68°F]
PWM frequency range
Recommended PWM frequency
*
Verify the PWM frequency is set correctly in the PLUS+1® controller. The default is set at 4000 Hz which will
significantly reduce performance.
*
12 Vdc 24 Vdc
640 mA 320 mA
1188 mA 594 mA
1500 mA 750 ma
5.7 Ω 21.2 Ω
100 to 200 Hz 100 to 200 Hz
*
100 Hz 100 Hz
Electric brake pressure defeat solenoid
M-option M6 M4
Voltage
Rated power
12 Vdc 24 Vdc
32 W 32 W
8 11024996 • Rev CA • August 2015
2 1
Electrical Installation S51 Electrohydraulic Proportional Control D7, D8, DA, DC
Electrical installation
Pinout
AMP Junior Power Timer connector
Pin location
Pinout
Pin Function
1 PWM signal
2 Ground
Pinout (alternative)
Pin Function
1 Ground
2 PWM signal
Pin compatibility
PLUS+1® module pin type/ Electric proportional solenoid pin compatibility
Pin Function
1, 2 PWMOUT/DOUT/PVG Power supply
1, 2 PWMOUT/DOUT/PVGOUT
1, 2 Power ground -
*
Use output pins with configurable PWM frequency.
*
*
PLUS+1® module pin type/ Electric brake pressure defeat solenoid
Pin Function
1,2 DOUT
1,2 DOUT/PVG Power
1,2 PWMOUT/DOUT/PVG Power supply
1,2 PWMOUT/DOUT/PVGOUT
1,2 Power ground -
11024996 • Rev CA • August 2015 9
Electrical Installation S51 Electrohydraulic Proportional Control D7, D8, DA, DC
Electrical installation
Pressure compensator logic
Hydraulic brake pressure defeat
Motor rotation High pressure port Control pressure on port*PCOR function
CW A XA yes
CW A XB no
CCW B XA no
CCW B XB yes
*
Differencial control pressure between port XA/XB:
∆p
= 0.5 bar [7 psi]
min
∆p
= 50 bar [725 psi]
max
Electric brake pressure defeat
Rotation High pressure port Solenoid PCOR function
CW A Energized Yes
CW A Non-energized No
CCW B Energized No
CCW B Non-energized Yes
Mating connector
AMP connector parts list
Description Quantity Ordering number
Two pin connector 1 Tyco Electronics 282189-1
Contacts 2 Tyco Electronics 929940-1
Seal plugs 2 Tyco Electronics 828904-1
Mating connector kit 1 Danfoss K19815
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Electrical Installation S51 Electrohydraulic Proportional Control D7, D8, DA, DC
11024996 • Rev CA • August 2015 11
Danfoss
Power Solutions GmbH & Co. OHG
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D-24539 Neumünster, Germany
Phone: +49 4321 871 0
Danfoss
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DK-6430 Nordborg, Denmark
Phone: +45 7488 2222
Danfoss
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Phone: +1 515 239 6000
Danfoss
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(Shanghai) Co., Ltd.
Building #22, No. 1000 Jin Hai Rd
Jin Qiao, Pudong New District
Shanghai, China 201206
Phone: +86 21 3418 5200
Products we offer:
Comatrol
www.comatrol.com
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www.schwarzmuellerinverter.com
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www.turollaocg.com
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www.hydro-gear.com
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www.daikin-sauer-danfoss.com
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•
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•
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Displays
•
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•
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•
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Please contact the Danfoss Power Solution representative nearest you.
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11024996 • Rev CA • August 2015 www.danfoss.com
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Danfoss A/S, 2015
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