Electrical InstallationReverse Displacement Motor (RDM)
Revision historyTable of revisions
DateChangedRev
September 2015Minor layout revisionBC
January 2015Fixed back pageBB
December 2014Added 24 V specificationsBA
May 2014First edition; Danfoss layout-DITA CMSAA
2L1427413 • Rev BC • September 2015
Electrical InstallationReverse Displacement Motor (RDM)
Contents
Literature references
Literature references....................................................................................................................................................................... 4
Latest version of technical literature.........................................................................................................................................4
Control options model code........................................................................................................................................................ 5
Description/theory of operation.................................................................................................................................................5
Electrical InstallationReverse Displacement Motor (RDM)
Literature references
Literature references
References
Literature ID numberTitleDescription
L1424445Reverse Displacement Motor (RDM)
Technical Information
Latest version of technical literature
Danfoss product literature is online at: http://powersolutions.danfoss.com/literature/
Complete product electrical and
mechanical specifications
4L1427413 • Rev BC • September 2015
ABC1C2 D E1 E2 E3FG H1J K1 K2
L
MN
P200139
Electrical Installation
Product overview
Product image
Control options model code
Reverse Displacement Motor (RDM)
RDM model code
E3 Optional Features
CodeDescription
112 V Integrated Shift Valve
224 V Integrated Shift Valve
Description/theory of operation
Reverse Displacement Motors are designed to operate in two positions: maximum forward and maximum
reverse displacement. The motors are spring biased to maximum forward displacement and hydraulically
shifted to reverse.
Reverse Displacement Motors have an integrated shifting valve to go from forward to reverse rotation.
The shifting valve is a proportional pressure reducing valve using system pressure to pilot the servo
piston.
The RDM control has a fail safe design. It has an internal orifice to damp the shifting between maximum
forward to maximum reverse and back. This feature protects the system components against fatal
damage in case the control signal changes without ramping or ir it gets lost immediately while reversing.
L1427413 • Rev BC • September 20155
P108731
Pressure port A (CW rotation)
Pressure port B (CCW rotation)
Cartridge
A
B
L1
reverse
RDM
Cartridge
A
B
L1
reverse
RDM
Electrical InstallationReverse Displacement Motor (RDM)
Product overview
Control current
Supply Voltage (Vdc)Current Range 0-100% [mA]
120-1500
240-750
Schematic Diagrams
Electrical specifications
DescriptionVoltage
12Vdc24Vdc
Maximum current1500mA750mA
Nominal coil resistance5.3 Ohms21.2 Ohms
PWM range70-200 Hz or straight 12Vdc
PWM frequency recommended100 Hz
ConnectorDeutsch connector DT04-2P
IP ratingIP 65
Ambient temperature limit80° C (175° F)
6L1427413 • Rev BC • September 2015
12
P003 480
Electrical InstallationReverse Displacement Motor (RDM)
Electrical installation
Pinout
Pin location
Pinout
PinDescription
1PWM signal
2Ground
Alternative pinout
PinDescription
1Ground
2PWM signal
Pin compatibility
Mating connector
PLUS+1® module pin type
PinFunction
1, 2PWMOUT/DOUT/PVG Power supply
1, 2PWMOUT/DOUT/PVGOUT
1, 2Power ground -
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