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ATyS d H - 544077E - SOCOMEC
12.4.
Loop checks
12.4.1. Circuit and components check (Dual Power Supply output circuit – DPS)
A1, A2 power input
B1, B2 power input
R: Relay HR710-2P
MGB: Contactor MC-40a
MGA: Contactor MC-40a
Note:
A – Power fed through A1 – A2 input terminals takes priority over B – Power supplied through B1 – B2 terminals. The
output terminals CP – CN are supplied by A – Power when both A and B – Power supplies are both available.
•
Should there be no output phase / neutral voltage between CP – CN terminals with A1 – A2 active, check relay R and
contactor MGA for contact continuity and correct operation.
•
Should there be no output phase / neutral voltage between CP – CN terminals with B1 – B2 active, check relay R and
contactor MGB for contact continuity and correct operation.