Installation
44 MS-9050UD PN 52413:C 01/23/08
2.4 Relays
The FACP provides two programmable Form-C relays and one fixed fail-safe Form-C trouble
relay, all with contacts rated for 2.0 amps @ 30 VDC (resistive) or 0.5 amps @ 30 VAC (resistive).
Note that relay connections must be power-limited. Refer to UL Power-limited wiring
requirements.
2.5 Notification Appliance Circuits
The control panel provides two NACs (Notification Appliance Circuits) Style Y (Class B) or Style
Z (Class A). Each circuit is capable of 2.5 amps of current. Total current in alarm for all external
devices cannot exceed 2.5 amps (refer to "Calculating the System Current Draw" on page 180).
Use UL listed 24 VDC notification appliances only. Circuits are supervised and power-limited.
Refer to the Fire-Lite Device Compatibility Document for a listing of compatible notification
appliances. The NACs, which are located on the main circuit board, may be expanded via the Fire-
Lite FCPS Series field charger/power supplies.
The following sections describe the configuration and wiring of Style Y and Style Z Notification
Appliance Circuits on the FACP main circuit board.
Figure 2.5 Relay Terminals
Relay contacts shown with power applied to panel and
no active troubles, alarms or supervisories
Note that the programmable relay labeled as
Relay 1 is factory default programmed as
Alarm and programmable Relay 3 is factory
default programmed as Supervisory.
The relay labeled Relay 2 is fixed as a
Trouble relay and cannot be changed. It is a
fail-safe relay which will transfer on any
trouble or total power failure.
9050udreyp.cdr
Reference
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