turck 6827380, Instructions For Use Manual

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2020/09
Cross-connecting relay module roots is achieved by the use of jumpers. The corresponding wiring
diagram including the jumpers can be found the manuals for BL20 I/O modules (German: D300716,
English: D300717).
8.2.5 Direct wiring of relay modules
As well as the options mentioned above, relay modules can be wired directly. In this case, base mod -
ules without C-rail connections should be chosen to guarantee the potential isolation to the adjoin -
ing modules.
8.3 Protecting the service interface on the gateway
During operation, BL20 label protecting the service interface and the rotary coding switches must
remain in place due to EMC and ESD requirements.
Fig. 39: Using the C-rail as protective earth and for the power supply with relay modules