M5
a
b
M4
T P
P102021
Solenoid Data
Code
Voltage
Current
Connector
DC
12 Vdc
340 mA
DIN 46350
DD
24 Vdc
170 mA
DIN 46350
A
P108 495E
B
Response time
The time required for the pump to change from zero to full flow (acceleration), or full flow to zero
(deceleration), is a function of the size of the orifice, the charge pressure, valve plates and other vehicle
dynamics.
A range of orifice sizes are available for the Series 90 FNR 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. For more
information regarding response time for individual orifices, please contact your Danfoss representative.
Pump output flow direction vs. control signal
Input shaft rotation
CW
CCW
Signal at solenoid
A
B
A
B
Port A flow (M1)
Out
In
In
Out
Port B flow (M2)
In
Out
Out
In
Servo cylinder (side)
M5 (2)
M4 (1)
M5 (2)
M4 (1)
W
Warning
Avoid designing a system which puts the swashplate into full stroke when control operation is blocked
by contamination.
Electric Displacement Control (EDC), Options KA, KP, KT
The electric displacement control uses an electrohydraulic Pressure Control Pilot (PCP) valve to control
the pilot pressure. The PCP converts an electrical input signal to a hydraulic input signal to operate a 4-
way servo valve, which ports hydraulic pressure to either side of a double acting servo piston. The servo
Technical Information
Series 90 Axial Piston Pumps
Control Options
520L0603 • Rev 0804 • March 2016
27
