Connection Of Actual Pressure Value Cables (Pressure Transducer) - Bosch Rexroth VT-MRMA1-1 Operating Instructions Manual

30/52 Installation
Bosch Rexroth AG, VT-MRMA1-1, RE 30214-B/03.2019
Terminal Pin
8
5 6 7 8
15
16 15 14 13
16
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:
Type:
Number of wires:
Table 28: Pinout of the connection between valve (ZDRS 6 VP-1X) <->
Connector
Mat. no. R900021448
1
2 5
3 4
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
1
1 2 3 4
2
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.
Assignment Explanation
X Actual position value of the valve
S
(Output signal of the position transducer)
-M - motor
+M + motor
max. 50 m (for greater lengths, please consult Rexroth!)
e.g. LiYCY 0.5 mm 2
5
Valve Designation
connection
1 + sensor
2 Actual position value
3 - sensor
4 + motor
5 - motor
PE n.c.
Assignment Explanation
-X Reference potential of the actual pressure value
P
(ground potential of pressure transducer)
+X Actual pressure value (pressure transducer output)
P
Amplifier module
Terminal 4
Terminal 8
Terminal 3
Terminal 16
Terminal 15