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CMC 850 User Manual
5.4 External Interface (“ext. Interf.”)
The interface connector “external Interface” holds four transistor binary outputs (Bin. out
11 - 14).
Bin. out 11 - 14 are bounce-free binary outputs (small signals) and have a minimal
reaction time.
For technical data → “Low Level Binary Outputs “ext. Interf.”” on page 19.
Pin assignment
Time Synchronization
To use the OMICRON-supplied CMIRIG-B interface unit as reference for the a time synchronization of
the IEC 61850 bus system, connect the CMIRIG-B‘s front side connector “CMC” to the CMC 850‘s
“external Interface” connector. This provides both the IRIG-B or PPS reference signal to CMC 850 and
the power supply for the CMIRIG-B.
Pin Function
Pin 1 Reserved
Pin 2 Reserved
Pin 3 Reserved
Pin 4 Neutral (N) connected to GND
Pin 5 Binary output 11
Pin 6 Binary output 12
Pin 7 Binary output 13
Pin 8 Binary output 14
Pin 9 Reserved
Housing Screen connection
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