ABB REF542plus - Appendix A: Connection Diagrams

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18. Appendix A: Connection diagrams
The pictures below show the connections plate for REF542plus both in the
wide and standard housing versions. The wide housing version can house
three binary input and output modules; the communication module, the
analog output module or alternatively the analog 4-20 mA input module. The
standard housing version can house at most two binary input and output
modules and alternatively the communication or the analog output module.
The connectors meaning is explained in the following.
Do not operate a switchgear unless the REF52plus connections
are properly done and verified by an expert electrician and
tightened.
A051446
Fig. 18.-1 REF542plus wide housing connections plate with mixed analog input
connector
1MRS755869
Multifunction Protection and Switchgear Control
Unit
Operator's manual
REF542plus