Installing External Sounders; Figure 3-7. Using A Supplementary Power Supply - Honeywell VISTA-250FBPT Installation And Setup Manual

• Do not set any keypads to address 31 (nonaddressable mode). They will interfere with other keypads (as well as
other devices) connected to the keypad terminals.
• If an "OPEN CIRCUIT" message is present on a keypad, data from the control is not reaching the keypad. Please
check your wiring.
Supplementary Power Supply for Additional Keypads
When the control's auxiliary power load for all devices exceeds 1A, you can power additional keypads from a regulated
12VDC power supply. Use a UL Listed, battery-backed supply for UL installations. For fire applications, the power
supply must be UL1481 Listed.
Connect the additional keypads as shown in Figure 3-7, using the keypad wire colors shown. Be sure to observe the
current ratings for the power supply used.
U L
For UL commercial fire and burglary installations, no more than one wire per terminal may be connected.
Use only 14-22AWG wire.
• Make connections directly to the screw terminals as shown in Figure 3-7.
• Be sure to connect the negative (–) terminal on the power supply unit to terminal 7 (–) on the control.

Installing External Sounders

The VISTA-128FBPT/VISTA-250FBPT provides two Notification Appliance Circuits for operating fire and burglary
alarm notification appliances. Each circuit is rated as Special Application or Regulated NAC for Fire and 10VDC –
14VDC, 1.7A max. power-limited for Burglary.
NOTE: Bell 1 should only be used for Burg and Bell 2 for Fire
NOTE: The total alarm current drawn from Auxiliary Power 1, Auxiliary Power 2, polling loop, Bell 1, and Bell 2 cannot
exceed 2.3A (for Canada 1.95A) for battery-independent operation.
The outputs have the following options:
Selectable to activate by individual zone assignments
•

Figure 3-7. Using a Supplementary Power Supply

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