In some applications you may need to wire three (3) SL-2000 smoke detectors to one (1) audible alarm or strobe. This is easily accomplished in three (3) steps.
- Power all the smoke detectors by the same power supply
- Wire the smoke detectors together for common alarm shutdown
- Wire the alarm to one of the smoke detectors.
Powering all of the smoke detectors by the same common power supply is the first step. This ensures that whenever one of the alarm trips you will open the circuit, interrupting voltage supply to the fan. Power to the detectors is given to the detectors by terminals 9 and 10. Shutting the fan down is typically done by using terminals 7 and 18 on any of the smoke detectors.
Wiring the smoke detectors together for common alarm shutdown is needed so that when one smoke detector goes into alarm, all of the smoke detectors will go into alarm. This is accomplished with the SL-2000 by using terminals 12 (alarm link +) and 20 (Aux power out +). Wire all three terminal 12’s in series. Then wire all there terminal 20’s in series.
Now all three smoke detectors are wired for common alarm shutdown.
Lastly wire the alarm to any one of the smoke detectors. Wire terminal 17(NO alarm contact) to the positive wire of the horn or strobe. Wire terminal 19 (Aux power out – ) to the negative wire of the horn or strobe. Place a jumper wire between terminal 20 (aux power out +) and terminal 6 (Common alarm contact).
Following these three steps will ensure that when any one of your smoke detectors trips, the fan will shut down and your audible or visual alarm will go off.