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ACM 150
The output relays are provided for interface to PLCs, for direct activation or alarm
devices and/or for 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 maximum 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 number 81 (Power Fail) and relay number 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.
•
See
Programmable relays
for additional information on programming.
30
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