Parker PV028 - Proportional displacement control with closed loop pressure control, code UDM (old: UPM)

8
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Bulletin MSG30-3254-INST/UK
Installation and setup manual
With compensator ordering code ...UDM a pres-
sure sensor and a proportional pressure valve
is combined with the remote pressure control
stage. That realizes a closed loop pressure
control. It also oers the option of an electronic
horse power limitation. The hydraulic circuit
for these control option are shown in figure 6.
The pressure sensor included in the shipment
is of the Parker model PVACMS (SCP01-600-
24-06). Also included in the shipment is a pro-
portional pressure pilot valve of the ordering
code PVACRE***K**. The hydraulic function is
described in the recent chapter. There are no
dierences except the pressure sensor.
S T
M
P1
P
AP T
AP T
S
U
P
T
WV
B
P
B
D2
AP T
AP
P
T
P
X
Q
X
P
I
P
I
Q:A
I
Q:B
W
Q
W
P
Displacement control valve
Code PVCMD1FBU**
Pressure compensator,
Code PVCM*U2**
Proportional pressure valve,
Code PVACRE***K**
P
U
Pressure sensor
SCP01-600-24-06
PVACMS*
4. Proportional displacement control with closed loop pressure control,
code ...UDM (old: UPM)
X
Q
= signal, displacement
I
Q:A
= solenoid current A, displacement control valve
I
Q:B
= solenoid current B, displacement control valve
X
P
= signal, pressure
I
P
= solenoid current, pressure pilot Valve
W
Q
= command, displacement
W
P
= command, pressure
Figure 6: Hydraulic Circuit of …UDM control