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Rev. 2.1 7-7-2017
Copyright © 2017 by Cool Air Incorporated. All rights reserved.
With the jumper in the rightmost position, connecting pins 2 to 1
(opposite of picture) 4-20 mA power must be supplied by an
external supply.
Jumpers Required
Jumpers J3 must be installed in either position. If the jumper is
removed, the 4-20 mA circuit(s) will not function.
Relays
The detector has three miniature printed circuit board relays: the
alarm, pre-alarm (early warning), and the auxiliary relays. In the
normal operating mode, the relays are energized in a normally-open
state. If a loss of power to the detector occurs, the relays will de-
energize and the alarms, if connected, will sound. When relays have
been activated by an alarm condition they will need to be manually
rest after conditions are returned to normal. (“
Resetting the
Relays
”)
