Bosch Rexroth RA 10 Series - Pin Assignment (Parallel Operation)

32/48 Analog amplifier RA | Installation
BoschRexrothAG, RE95230-B/2021-12-01
Table 7: Pin assignment RA2-1
Signal Description Pin
Outputs
PWM 1 out Proportional solenoid output outputs (solenoid 1) 1
PWM 1
Feedback
Ground for proportional solenoid 1 14
PWM 2 out Proportional solenoid output (solenoid 2) 13
PWM 2
Feedback
Ground for proportional solenoid 2 25
Notice:
The PWM solenoid return lines do not have to be returned to the analog amplifier.
Di
g Out S
witching output 7
ERR Ind Out Error output.
The output is active if:
• voltage supply at pin19 and/or pin20 falls below approx.9 V
• the external sensor supplies (8.4 V and 4.0 V) are faulty
• the circuitry at pin16 and pin23 is faulty
15
V mid ext 1 Sensor or potentiometer supply voltage 4.0 V 3
V pos ext 1 Sensor or potentiometer supply voltage 8.4 V 16
V mid ext 2 Sensor or potentiometer supply voltage 4.0 V 11
V pos ext 2 Sensor or potentiometer supply voltage 8.4 V 23
7�4�5 Pin assignment (parallel operation)
The following table shows the important pinassignments for parallel operation.
The other pins are to be wired according to Table 7 "Pin assignment" on page 31.
Table 8: Pin assignment (parallel operation)
Signal Description Pin
Inputs
Parallel operation Connected with +U
Bat
: parallel operation, independent control of both solenoids.
Notice:
If the connection is interrupted, only one output stage is controlled.
9
P
o
tentiometer 1
Potentiometer 2
Function of pins:
16, 23:
8.4 V internal voltage
3, 11: 4 V internal voltage
2, 12: Signal ground
Differential inputs:
17, 22:
inverting input
4, 10: non-inverting input
The voltage difference is used to generate command values. In order to obtain amaximum
command v
alue, avoltage difference of 4 V has to be applied at the inputs of the differential
amplifier.
17, 16, 4, 3,
2, 23, 22, 12,
11, 10