29
Alarm Indicating
Device Type
Supervising the Notification Appliance Circuits
To wire the NAC using the supervision feature, perform the following:
Install a 2K EOL resistor (Model 2EOL, supplied) across the last notification appliance on each Notification Appliance
Circuit to be supervised.
Auxiliary Relay Connections
The VISTA-128FBPT/VISTA-250FBPT provides a built-in Form C relay with contacts rated at 28VAC/VDC, 2.8A. The
relay may be programmed (field 3
∗
61) for one of the following functions:
• Alarm Activation
• Trouble/Supervisory Activation
• 4-Wire Smoke Detector Reset
• Battery Saver
Alarm Activation
(3
∗
61 = 1 or 4) Steady activation in response to an alarm.
If field 3
∗
61 = 1, the auxiliary relay remains active until Aux. Relay Timeout expires or until User Code + OFF is
entered. This option can be used to provide an unsupervised Notification Appliance Circuit for supplementary strobes,
sounders, etc. when wired to the Aux Power 1 or a separate power supply, see Figure 3-8.