30/52 Installation
Bosch Rexroth AG
, VT-MRMA1-1, RE 30214-B/03.2019
Terminal
Pin
Assignment
Explanation
5 6 7 8
8
X
S
Actual position value of the valve
(Output signal of the position transducer)
16 15 14 13
15
-M
- motor
16
+M
+ motor
Key data:
Due to the confined space in the mating connector on the valve, only one cable
thickness can be used for connecting the valve:
Cable length:
max. 50 m (for greater lengths, please consult Rexroth!)
Type:
e.g. LiYCY 0.5 mm
2
Number of wires:
5
Table 28: Pinout of the connection between valve (ZDRS 6 VP-1X) <->
Connector
Mat. no. R900021448
Valve
connection
Designation
Amplifier module
1
2
3
4
5
1
+ sensor
Terminal 4
2
Actual position value Terminal 8
3
- sensor
Terminal 3
4
+ motor
Terminal 16
5
- motor
Terminal 15
PE
n.c.
7.6.4 Connection of actual pressure value cables (pressure transducer)
A pressure transducer (e.g. HM20-2X) is used for acquiring the actual pressure value.
It is mounted directly to the pressure reducing valve:
Table 29: Terminal assignment of actual pressure value input
Terminal
Pin
Assignment
Explanation
1 2 3 4
1
-X
P
Reference potential of the actual pressure value
(ground potential of pressure transducer)
2
+X
P
Actual pressure value (pressure transducer output)
When using the differential input (actual pressure value) always activate or
deactivate both inputs simultaneously.
The supply of the pressure transducer is ensured by an external power supply
unit (see figure below), whose ground has the same potential as terminal 11 of
the amplifier module.
