DAVIS Alarm Output Module - Manual (Page 8)

Page 8 Alarm Output Module
✦ Latch Circuit Outputs (L1 and L2) and Red LED Indicators
The AOM includes two latch circuits; each has one output contact and a
red LED indicator. The latches are set and reset by selected alarms,
enabling the user to set up two simple control circuits in which each out-
put “contact” is set on by one alarm and set off by another. (For example,
start a fan when the high temperature alarm becomes active and keep it
running until the low temperature alarm becomes active.) The red LED
indicators display the status of each of the latches. When the LED is
lighted, the output is closed.
If using latch circuits, jumper J7 must be placed in the NORMALLY-
OPEN position.
✦ Latch Circuit L1 is set
on (output CLOSED)
by alarm output A
and reset by alarm
output B.
✦ Latch Circuit L2 is set
on (output CLOSED)
by alarm output C and
reset by alarm
output D.
✦ “ENABLE” switch (in the upper right corner of the AOM board)
The ENABLE switch opens all outputs when set to “OFF”. The indica-
tors continue to display the condition of the selected alarms or remote
control lines.
✦ Power Connector (A2)
To provide power to the AOM, you must connect the AOM power
adapter to connector A2.
✦ AOM Cable Connector (A1)
To enable the console to update the status of the AOM outputs, you must
run the AOM Cable from connector A1 on the AOM to connector S6 on
the sensor interface module (SIM) or the interface cable adapter module
(ICAM).
✦ Alarm Signal Selection Panel (J3 and J5)
The row of pin jacks at J3 enables you to program specific alarms for
each of the four alarm outputs. Each of the numbered pin jacks at J3 is
assigned to an alarm on the station (see “Connecting alarm signals to
alarm outputs” on page 9 for a list of the pin assignments for each sta-
tion). The four pin jacks next to the solid white rectangles provide loca-
tions to “park” unused jumper wires.
Terminal J5 contains four jumper wires, one for each alarm output (A, B,
C, D).To connect an alarm signal to one of the alarm outputs, insert the
desired jumper wire from J5 in the appropriate pin jack on J3.