Siemens Sinumerik 840D Series - Page 251

10.03
A.1 Servo solenoid valves
A-251
 Siemens AG, 2003. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
+15 V
-15 V
Reference point
Setpoint 0...
Actual valve spool Supply Protective Shield
2.5 AF
100k 100k
10k
+U
B
DC
DC
S
U
PID
Logic
+ -
PD
+ -
0...
1 2 3 4
+
-
10 V
+
-
10 V
+24 V=O
B C D I F
0 V
1)
Actual valve spool
0 V Sign.
1) Do not connect to 0 V supply
connect
+U
B
-15 V=
ref. 0
+15 V= Signal
Main stage
Pilot stage
Diff. amp.
S
U
conductor value value
Fig. A-16 Valve amplifier block diagram for pilot-controlled servo solenoid valves, sizes 10 and 16 (Rexroth)
A Hydraulics