Detcon 12B - Manual (Page 8)

Model 12B
12B Control Module Instruction Manual Rev 1.4 Page 4 of 12
Figure 1 Alarm Set switches and Alarm Relay Jumpers
4.2 Latching or non-Latching Relays
All alarms — alarm 1, 2, 3, and fault — can be jumper programmed to operate as latching or non-
latching. If an alarm is programmed to latch, its corresponding relay and LED indicator, once
activated, will stay activated until the reset button is pressed (assuming, of course, that alarm
conditions have cleared).
To program an alarm for latching operation: Place a jumper tab on pins 1 and 2 (left and center) of
its corresponding jumper location. For non-latching operation place the tab on pins 2 and 3 (center
and right) of the jumper location. The jumper locations are as follows: fault - JP12, alarm 1 - JP9,
alarm 2 - JP5, and alarm 3 - JP1.
4.3 Relay Contact Output Select
All alarm relays — alarm 1, 2, 3, and fault — can be jumper programmed for dry contact output as either
normally open or normally closed. Refer to section 2.1 for contact ratings. To program an alarm relay for
normally open contact output, place a jumper tab on pins 1 and 2 (bottom and center) of its corresponding
jumper location. For normally closed contact output, place the tab on pins 2 and 3 (center and top) of the
jumper location. The jumper locations are as follows: fault - JP20, alarm 1 - JP18, alarm 2 - JP16, and alarm 3
- JP14.