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The terminal blocks for the relay contacts are located on the relay panel. Relays include:
Four Level 1 alarms (RY1, RY3, RY5, RY7)
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Four Level 2 alarms (RY9, R11, RY13, RY14)
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One general Level 1 alarm (RY2)
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One general Level 2 alarm (RY4)
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One watch dog (power loss/CPU failure) relay (RY12)
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One maintenance fault relay (RY8)
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One instrument fault relay (RY10)
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One Out of Monitoring relay (RY6)
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NOTE: Make sure that watch dog relays and instrument fault relays are wired in series to ensure
that any fault will trigger a diagnostic alarm. This will ensure a fail-safe operation.
3.7.2 Ratings
To ensure reliable contact operation, the following limits must be observed:
0.1 to 2.0 amps
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@5-24 VDC or
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@5-120 VDC
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RISK of improper operation. The alarm relay has a minimum load requirement of
greater than 5V and 100 mA. For reliable relay operation, ensure the alarm circuit
meets these requirements. The relay contacts are protected by metal oxide varistors
rated for 120 VAC maximum operation.
VC4™
CAUTION
30
User Manual
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