Series 90 Axial Piston Pumps Technical Information Control options 3 -POSITION (FNR) ELECTRIC CONTROL
The 3-Position (F-N-R) control uses an electric input signal to switch the pump to a full stroke position. To use the FNR control in a PLUS+1 Guide application, download HWD file 10106826 from www.sauer-danfoss.com/Plus1.
Solenoid connector
3-position electric control hydraulic schematic
Solenoid plug face for DIN 43650 connector SAUER-DANFOSS mating parts kit Part No. K09129
b
a
Not connected
1
Voltage between terminals 1 and 2
2
T P
M5 M4
P102021
P102 022
Displacement
Pump displacement vs. electrical signal
-b
100 %
"0"
Solenoid Data
b
Voltage 12 VDC
Power 33 W
Connector Din 46350
24 VDC
33 W
Din 46350
Voltage VDC
100 % P102 023
Response time The time required for the pump output flow to change from zero to full flow (acceleration) or full flow to zero (deceleration) is a function of the size of the orifice in the control flow passage. A range of orifice sizes are available for the Series 90 Electric Displacement Control to assist in matching the rate of swashplate response to the acceleration and deceleration requirements of the application. Testing should be carried out to determine the proper orifice selection for the desired response. Pump output flow direction vs. control signal
250 - 128
Input shaft rotation Signal at solenoid
a
b
a
b
Port A flow Port B flow
Out In
In Out
In Out
Out In
Servo cylinder active
M5
M4
M5
M4
520L0603 • Rev FB • July 2007
CW
CCW
23
