Installation

Relays

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 may be power-limited or nonpower-limited, provided that 0.25” spacing is maintained between conductors of power-limited and nonpower- limited circuits. Refer to UL Power-limited wiring requirements.

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.

TB7 TB5 TB6

RELAY 3

 

RELAY 1

 

RELAY 2

 

 

 

 

 

NO NC C

 

NO NC C

 

NO NC C

 

 

 

 

 

92udreyp.cdr

Relay contacts shown with power applied to panel and no active troubles, alarms or supervisories

Figure 2.6 Relay Terminals

2.5 Notification Appliance Circuits

See Page

Reference

Manual

The control panel provides four Style Y (Class B) or two Style Z (Class A) NACs (Notification Appliance Circuits). Each circuit is capable of 2.5 amps of current. Total current in alarm for all external devices cannot exceed 6.0 amps (refer to "Calculating the System Current Draw" on page 164). Use UL listed 24 VDC notification appliances only. Circuits are supervised and power-limited. Refer to the 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 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 MS-9200UDLS main circuit board. The NACs are configured for Style Y (Class B) from the factory. Refer to "Configuring NACs" on page 33 for information on changing the NAC configuration to Style Z (Class A).

32

MS-9200UDLS PN 52750:A 11/04/05