Bosch Rexroth VT-VSPA2-1-2X/V0/T5 - Page 59

6/10 Bosch Rexroth AG Hydraulics
Additional information RE 30110-Z/10.12
Block diagram / pinout VT-VSPA2-1-1X/T1
u
14c
K5
14a 10c 10a
8a
12a 12c
K1
K2
K3
K4
R4R3
R2
R1
Ba
+
K6
H1
H2
K3
K2
K1
H4
H3
K4
K5
K6
16c
26c
20c
2a
18a
16a
6c
6a
4a
8c
4c
18c
30a
24a 22a 28a
32a
+ U
B
26a
J5, J6
u/i
J1 J4
2c
J7
H11
3,15 AT
20a
32c
=1
30c
H12
X1X1
0 V
+ 9 V
M0
 9 V
2200 µF
28c

=
+ U
B
9
1
I
A
w
11
7
7
8
6
5
43
2
1
i
å
å
u
10
10
u
i
PI PI
8
8
F F F F
F
F F F F
F
F
I
B
F
=1
F
Bb
t
Zw
F
Gwa
Gwb
H1 to H4
LED display of the command value call-ups
K1 to K6 Call-up relay
R1 to R4 Command values
Gwa Command value attenuator solenoid "A" Gwb Command value attenuator solenoid "B"
Ramp external
Positive command value (0 V to 10 V or 12 mA to 20 mA) controls solenoid "B".
1 Command values 2 Differential input 3; 6 Summing device 4 Ramp generator 5 Step function generator 7 PI current controller 8 Output stage with clock generator 9 Power supply 10 Monitoring 11 Cable break monitoring
(only with 4 to 20 mA)
Command value 5 ±6 V Command value 4 ±9 V Command value 3 ±9 V Command value 2 ±9 V Command value 1 ±9 V
Command value 6
Reference potential
Auxiliary voltage ±9 V
Measurement null (M0) is increased by
9 V as compared to the operating voltage!
Call-up command value 1 Call-up command value 2 Call-up command value 3 Call-up command value 4
Call-up "Ramp off"
Call-up "Switch-over auxiliary voltage"
Relay call-up voltage (+24 V)
Current command value at "w" 0 to +6 V for solenoid "A" 0 to –6 V for solenoid "B" Actual current value I
A
at "I
A
"
Actual current value I
B
at "I
B
"
Solenoid "A"
Solenoid "B"
"Ready for operation" Operating voltage
F = On front plate
Negative command value (–10 V to 0 V or 4 mA to 12 mA) controls solenoid "A".
Differential input
Command value after ramp
J7: Release internal
Release external (+U
B
)
Zw Zero point command value Ba Bias current solenoid "A" Bb Bias current solenoid "B" t Ramp time