IEC1MRK002801-AA11-UTAN-RAM V1 EN
IEC1MRK002802-AA-13 V1 EN
Figure 527: Binary in/out module (IOM), input contacts named XA corresponds to
rear position X31, X41, and so on, and output contacts named XB to
rear position X32, X42, and so on
The binary input/output module version with MOV protected contacts can for example
be used in applications where breaking high inductive load would cause excessive wear
of the contacts.
1MRK505222-UUS C Section 19
IED hardware
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Technical reference manual