1.2.6.4.3 Wiring the safety inputs
Attention
For SIL 3, PL e, cat.3 it is required to send test pulses from the PLC to the output or to ensure fault
exclusion for wiring “Short circuit between any two conductors” according to ISO 13849-2:2012 between
signals STO-SBC 1 and STO SBC 2
permanently connected (fixed) and protected against external damage, e.g. by cable ducting,
armouring, OR
separate multicore cables, OR
within an electrical enclosure, OR
individually shielded with earth connection.
1.2.6.4.3.1 Cabling lenghts
Please observe the maximum allowed cable lengths:
Connection Maximum wire
length
STO-SBC 30 m
1.2.6.4.3.2 Connection diagrams for the STO inputs
Important
Please note that Safety GND is an isolated signal from drive GND.
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