Auxiliary alarms are triggered from either an external CO or site source or by the standard alarm relay. Like the standard relay, when triggered, the auxiliary relay is
External Alarm Device
External Alarm Device
External Alarm Device
External Alarm Device
+GND (or POS) NEG (or | NEG (or |
Auxiliary Relay
Contacts
Auxiliary Relay
Trigger
FA AUX RLY |
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FA AUX RLY | A | B | |
FA | |||
| FA | ||
FA +GND IN** |
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| FA +GND IN** | ||
FAIL |
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RELAY |
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| NO C NC NO C NC | Nomenclature is | |
| Internal Wiring | for contacts | |
| * NEG (or | ||
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| ** POS (or +GND) trigger. |
a. Separate Alarms for Side A & Side B
External
Alarm Device
External
Alarm Device
+GND (or POS) NEG (or
Auxiliary Relay
Contacts
Auxiliary Relay
Trigger
FA AUX RLY |
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FA AUX RLY | A | B | |
FA | |||
| FA | ||
FA +GND IN** |
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| FA +GND IN** | ||
FAIL |
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RELAY |
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| NO C NC NO C NC | Nomenclature is | |
| Internal Wiring | for contacts | |
| * NEG (or | ||
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| ** POS (or +GND) trigger. |
b. Combined Alarms for Side A & Side B
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| External |
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| Alarm Device |
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| External |
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| Alarm Device |
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+GND (or POS) NEG (or |
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Auxiliary Relay | FA AUX RLY |
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Contacts | FA AUX RLY | A | ||
Auxiliary Relay | FA | |||
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Trigger | FA +GND IN |
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FAIL
RELAY
External
Alarm Device
External
Alarm Device
NEG (or
B
FA
FA +GND IN**
NO C NC NO C NC | Nomenclature is |
| for contacts |
+GND (or POS)
c. Using the Standard Alarm to Trigger Auxiliary Alarms When a Fuse Blows
Auxiliary Alarm Wiring
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