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Rev. 11-5 12/15/2020
Copyright © 2020 by Cool Air Incorporated. All rights reserved.
With the jumper in the leftmost position, connecting pins 2 to 3 (as
shown in the picture on the next page) 4-20mA power is supplied
by the on-board supply.
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.
NOTE:
This detector does not support a 4 to 20mA output for the
temperature sensor.
J
J
u
u
m
m
p
p
e
e
r
r
s
s
R
R
e
e
q
q
u
u
i
i
r
r
e
e
d
d
Jumpers J3 must be installed in either position. If the jumper is
removed, the 4-20 mA circuit(s) will not function.
R
R
e
e
l
l
a
a
y
y
s
s
The detector has three miniature printed circuit board relays: the
alarm, pre-alarm (early warning), and the auxiliary relays. The
auxiliary relay operates as selected. (see pairing the Aux Relay) The
factory default is for the auxiliary relay to operate only when there
is an “Err” (error) with the detector. 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.
