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The output relays are provided for interface to PLCs, direct activation of alarm devices,
and direct initiation of automatic gas shutdown. They may also be wired to status panels.
All relays are double-pole double-throw (DPDT) with dry contacts rated for 30 Vdc, 2 A.
Figure 16. Relay Schematic
• Relay shown in normal position - (Deenergized with no alarm present).
• This diagram is typical of all 86 relays. Relay numbers 81 (Power Fail) and 82
(Watchdog) are inverted – power is always on and drops upon a trouble condition.
• Relay numbers 81 (Power Fail) and 82 (Watchdog) are inverted – power is always on
and drops upon a trouble condition.
• Relays number 1 to 80 are programmed by software, relays number 81 through 86 are
fixed in function.
• Relays number 1 to 80 are programmed by software, relays number 81 through 86 are
fixed in function.
• See Programming relays for additional programming information.
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