Wiring
Operating Manual PSSu E F BSW(-T)
21372-EN-06
25
Switching an earthed actuator
Output module (ST)
[ . . . ]
Periphery Supply
PSSu E F BSW(-T)
Output module (ST)
+24 V DC
0 V DC
Module Supply
Output module (ST)
Output module (ST)
=
~
N
L1
[ . . . ]
[ . . . ]
Actuator
+24 V DC
0 V
On earthed actuators, the actuator's 0 V connection must be connected to 0 V of the peri-
phery supply (external supply voltage).
Reason: The switch (0 V periphery supply) in the PSSu E F BSW module is bridged when
the actuator's earthed 0 V connection is connected to 0 V on the connected periphery sup-
ply. In this case, the PSSu E F BSW registers a short circuit between 0 V of the external
supply voltage and 0 V of the connected periphery supply.
Error reaction: The PSSu will not start and all affected I/O-Groups (SafetyBUS p) remain in
a STOP condition.
