20/36 Commissioning
Bosch Rexroth AG
, Valve amplifier VT-MSPA, RE 30232-B/08.2020
8.2 Block circuit diagram VT-MSPA2-2X
XH1
X2A
XH2
X2A
XH2
A
B
XH1
V
1
2
10
9
5
6
12
11
Zw
-1
(1)
(2)
(5)
(11)
(12)
(10)
(12)
(10)
(9)
(9)
(7
)
(6
)
(8
)
(14)
(13)
(15)
(4)
(3)
8
4
3
7
U
U
0V
+24V
+U
KB
A
tt
tt
t
tt
tt
I
A
I
A –
I
B
I
B
t
KBB
KB
A
KBB
MO -U
U
U(I)
U
U
U
U
a
b
U
U
U
U
+In
-In
DI
-Out
+Out
G
x
y
B
S
G
PWM
PID
PWM
PID
B
S
G
Enable
Enable
Logic
Ac
tual
value
Suppl
y
volt
ag
e
C
ommand
value
Di
git
al in
put
Re
ad
y f
or
oper
at
ion
Te
st jac
k
Cable br
eak
Cable br
eak
Enable
1
Power supply unit
2
Differential amplifier
3
Command value summator
4
Zero point adjustment
5
Inversion
6
Simple ramp
7
4-quadrant ramp
8
Command value attenuator
9
Characteristic curve generator
10
Current regulator
11
Clock pulse generator
12
Output stage
13
Enable or inversion or ramp off or
4Q ramp
14
Switching logic/error detection
15
Digital output