Bosch REXROTH VT-MRPA1-2X - 8.1 Block circuit diagram of VT-MRPA1-2 X

Commissioning 19/19
RE 30220-B/05.2019, Valve amplifier VT-MRPA1, Bosch Rexroth AG
8.1 Block circuit diagram of VT-MRPA1-2X
v
7
5 6

3
Zw
4
1
U
U
+U M0 -U
1
0V
XH1
+24V
11
2
U(I)
U
2
+In
X2A1
-In
10
9
10
12
XH2
5

6
U
U
12
11
-Out
X2A1
+Out
U
I
9
w
8
13
14
4 3
8 7
n.c. n.c.
XH1
XH2
X2A2
t
t
tt
Gw
y
x
x
Gx
Zx
16 14
15 13
1
2
4
2
3
1
2
Solenoid
Enable
Logic
Actual
value
Supply
voltage
Com-
mand
value
Enable
Ready
Solenoid cable break Short-circuit of solenoid Position transducer cable break
Test jacks
Position controller
Enable
Solenoid cable break
Short-circuit of solenoid
Demodulator
Position trans-
ducer cable break
Sine
oscillator
Position transducer
1 Power supply unit 2 Differential amplifier 3 Command value summator
4 Zero point adjustment 5 Simple ramp 6 2-quadrant ramp
7 Command value attenuator 8 Position controller 9 Output stage
10 Enable input 11 Switching logic/error detection 12 Ready-for-operation output
13 Actual value zero point trimming 14 Sensitivity calibration of act.
value position