ABB REF 542plus, Operator'S Manual, Page: 73 / 134

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19. Appendix A: Connection diagrams
The pictures below show the connections plate for REF 542plus 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 REF542plus connections are
properly done and verified by an expert electrician and tightened.
A051446
Fig. 19.-1 REF 542plus wide housing connections plate with mixed analog input
connector
Multifunction Protection and Switchgear Control Unit
Operator's manual
REF 542plus REF 542plus
1MRS755869