Siemens Sinumerik 840D Series - Page 253

10.03
A.1 Servo solenoid valves
A-253
 Siemens AG, 2003. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
+24 V=
1 2 3 4 5 6
0 V
7 8 9
10 11
24 V 24 V
24 V
0 V
Sign.
0 V
+15 V
-15 V
Output stage supply enabling of Setpoint 0... Actual valve spool value
Enable acknowledgement
Electronics supply Error message Protective Shield
+24 V=/<=0.5 A
2.5 AF
100k 100k
10k
+U
B
DC
DC
+U
B
S
U
HRV
PID
Logic
+ -
PD
+ -
0...
1 2 3 4
+U
B
+
-
10 V
+
-
10 V
conductor
Fig. A-18 Valve amplifier block diagram for directly-controlled HR servo solenoid valves (Rexroth)
A Hydraulics