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Wiring
6.3
Connecting the module
If you are using actuators for safety-related functions, it is essential that you note the follow-
ing:
}
A safety assessment must be made for each individual application.
}
Input modules may not be used within an output block. If an error occurs, input modules
could supply an external voltage which cannot be switched off.
}
The position of each single actuator must be monitored, e.g. via an FS feedback loop
with test pulses.
}
To prevent contact welding, a fuse should be connected before the periphery supply in-
feed (see Technical details).
}
The following applies for floating actuators:
All actuator masses must be fed back to the output modules.
}
The following applies for earthed actuators:
The possibility of a short circuit to + 24 V of the external supply voltage must be ex-
cluded.
When using modules of type PSSu E PD in an output block, please note the following:
}
Do not connect capacitive loads.
}
During the power-up test, the relay contacts are tested with pulses of up to 60 ms.
Operating Manual PSSu E F BSW(-T)
21372-EN-06
Fuse
=
~
Connect to the 0 V supply and
L1
N
earth at a single point
11
12
Periphery Supply
13
14
PSSu E F BSW/
PSSu E F BSW-T with
- PSSu BS 2/8S(-T)
- PSSu BS 2/8C(-T)
C-rail supply
21
22
23
24
27
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