Installation 29/52
RE 30214-B/03.2019, VT-MRMA1-1,
Bosch Rexroth AG
7.6.2 Connection of the power supply unit
Whenever possible, system circuits should be engineered so that the analog
amplifier module and all connected components are always switched on
simultaneously.
From the operating voltage applied, the analog VT-MRMA1-1 amplifier module
generates the internally/externally required system voltages for
• logic
• output stage
• signal processing
• position transducer supply
A suitable power supply unit for the analog amplifier module is VTNE30-2X (see data
sheet 29929).
Table 26: Terminal assignment to the power supply unit
Terminal
Pin
Assignment
Explanation
12 11 10 9
11
Ground or L0 (0V)
Reference potential of operating voltage
+U
B
12
+U
B
Operating voltage
7.6.3 Connection of the pressure reducing valve
5 terminal connections on the amplifier module are reserved for the connection to
the pressure reducing valve. The terminal connections are assigned to the following
components of the pressure reducing valve:
• DC motor (2 supply connections)
• Position transducer (2 supply connections, 1 connection for the actual position
value)
Fig. 9: Terminal connections of the amplifier module (viewed to the front)
Table 27: Terminal assignment to the pressure reducing valve
Terminal
Pin
Assignment
Explanation
1 2 3 4
3
- sensor
Position transducer ground
4
+ sensor
Position transducer supply
Position command value
Position
transducer
DC motor
Main stage
Actual position value
Position transducer supply
