MAKING MODERN LIVING POSSIBLE
Electrical Installation
S42 Pump
High Current Electrical
Displacement Control (HCEDC)
powersolutions.danfoss.com
Electrical Installation S42 HCEDC
Revision history Table of revisions
Date Changed Rev
September 2015 Converted to Danfoss layout BA
May 2010 First edition AA
2 L1022914 • Rev BA • September 2015
Electrical Installation S42 HCEDC
Contents
Literature references
S42 HCEDC literature references.................................................................................................................................................4
Latest version of technical literature.........................................................................................................................................4
Product overview
Product image................................................................................................................................................................................... 5
Nomenclature....................................................................................................................................................................................5
Theory of operation.........................................................................................................................................................................6
Hydraulic schematics...................................................................................................................................................................... 7
Electrical specifications.................................................................................................................................................................. 7
Electrical installation
Pinout....................................................................................................................................................................................................9
DEUTSCH connector.................................................................................................................................................................. 9
Pin compatibility...............................................................................................................................................................................9
Input/output matrix......................................................................................................................................................................10
Mating connector.......................................................................................................................................................................... 10
DEUTSCH connector parts list .............................................................................................................................................10
L1022914 • Rev BA • September 2015 3
Electrical Installation S42 HCEDC
Literature references
S42 HCEDC literature references
Literature title Description Literature number
S42 Axial Piston Pumps Technical Information Complete product electrical
S42 HCEDC Controls Function Blocks User Manual Compliant function block
Latest version of technical literature
Danfoss product literature is online at: http://powersolutions.danfoss.com/literature/
and mechanical
11022637
specifications
L1020609
set-up information
4 L1022914 • Rev BA • September 2015
S42
Rotation
Y C D E F Q R G S T U H J K L M N P
Electrical Installation
Product overview
Product image
Nomenclature
S42 HCEDC
S42 HCEDC
Code D options
Option Description
E2C7 High current, 12V dual solenoid, 300-1000 ma, 2 x DEUTSCH connectors on wires, high gain spool
E2C8 High current, 12V dual solenoid, 300-1000 ma, 2 x integral DEUTSCH connectors, high gain spool
E2D8 High current, 24V dual solenoid, 300-1000 ma, 2 x integral DEUTSCH connectors, high gain spool
Only certain control options for the S42 pump utilize the High Current Electrical Displacement Control
(HCEDC). Please refer to the pump’s nomenclature to determine if the pump is equipped with the proper
option. The nomenclature can be found on the pump’s nametag. For nomenclature details, refer to S42
Axial Piston Pumps Technical Information, 11022637.
L1022914 • Rev BA • September 2015 5
0
100 %
100 %
Displacement
Current mA
W
Electrical Installation
Product overview
Theory of operation
S42 HCEDC
The High Current Electrical Displacement Control (HCEDC) uses two Proportional Pressure Reducing
Valves (PPRV) to provide reducing pilot pressure. The PPRV converts an electrical input signal to a
hydraulic input signal to operate a spring centered sensing piston. The sensing piston produces a
mechanical input to the servo control valve in the pump housing, which ports hydraulic pressure to
either side of the servo piston.
The position of the swashplate is proportional to the electrical input signal. The control has mechanical
feedback that regulates the servo valve in relation to swashplate position to maintain displacement at
the commanded level regardless of changes in system pressure. Any swashplate position error is fed back
to the servo control valve for instant correction.
The servo control valve has variable geometry porting to regulate swashplate response relative to input
command. The control performs small displacement change commands with maximum controllability
throughout the entire stroking range of the pump. It completes large displacement change commands
with rapid swashplate response. Optional servo supply and drain orifices are available for special
response needs
HCEDC proportional actuation
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.
6 L1022914 • Rev BA • September 2015
M5
M4
X1
X2
SOL B
Charge Pressure
(Lower)
SOL A
(Upper)
0
-b -a
ba
100 %
100 %
Displacement
Current mA
Electrical Installation S42 HCEDC
Product overview
Hydraulic schematics
HCEDC hydraulic schematic
Electrical specifications
Pump displacement versus control current
S42 HCEDC electrical specifications
Voltage
Threshold current
End current
Maximum current
Rated power
Coil resistance at 20ºC [70ºF]
Coil Resistance at 60°C (140°F)
12 V 24 V
300 mA 150 mA
750 mA 375 mA
1330 mA 665 mA
16 W 16 W
9.0 Ω 36.0 Ω
12.4 Ω 49.7 Ω
L1022914 • Rev BA • September 2015 7
Electrical Installation S42 HCEDC
Product overview
S42 HCEDC electrical specifications (continued)
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 HCEDC performance.
100 to 200 Hz 100 to 200 Hz
*
200 Hz 200 Hz
8 L1022914 • Rev BA • September 2015
1 2
W
Electrical Installation
Electrical installation
Pinout
S42 HCEDC
DEUTSCH 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
Pin Function
1, 2 PWMOUT/DOUT/PVG Power supply
1, 2 PWMOUT/DOUT/PVGOUT
1, 2 Power ground -
Warning
Unintended vehicle or machine movement hazard. Verify the wiring harness to ensure the correct PLUS
+1® pin is properly connected to each control pin.
L1022914 • Rev BA • September 2015 9
Solenoid B
Solenoid A
Electrical Installation S42 HCEDC
Electrical installation
Input/output matrix
HCEDC control
Pump output flow direction versus control signal
Shaft rotation
Solenoid energized
Port A flow
Port B flow
Servo port pressurized
*
For coil location, refer to installation drawings in the S42 Axial Piston Pumps Technical Information, 11022637
CW CCW
*
A B A B
Out In In Out
In Out Out In
M4 M5 M4 M5
Mating connector
DEUTSCH connector parts list
Description Quantity Ordering number
Connector
Wedge lock
Socket contact (16 and 18 AWG)
Mating connector kit
1 DEUTSCH DT06-2S
1 DEUTSCH W2S
2 DEUTSCH 0462-201-16141
1 Danfoss K29657
10 L1022914 • Rev BA • September 2015
Electrical Installation S42 HCEDC
L1022914 • Rev BA • September 2015 11
Danfoss
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Phone: +49 4321 871 0
Danfoss
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Danfoss
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Phone: +86 21 3418 5200
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www.comatrol.com
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www.daikin-sauer-danfoss.com
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