Cooper Bussmann PS manual Bussmann Power Module Switch

	Bussmann®
Bussmann® Power Module™ Switch	PS
All-In-One Module

Typical Control with Wiring Options for Fire Safety Interface (Option R1)

Legend:

N.O.F.A. – Normally Open Fire Alarm contacts supplied from the fire alarm system to initiate the shunt trip.

Shunt Trip – Solenoid for remote trip of switch, which is activated by the closing of the fire alarm contacts or key test switch. Option R1 – Fire Safety Interface Relay that is operated at 120VAC from secondary of transformer. No additional power needed. CR – Control Relay used to isolate the N.O.F.A. contacts from the duty of the shunt trip.

FR – Fire Alarm Voltage Monitoring Relay used to monitor presence of voltage in switch from a remote location (i.e. Fire Alarm Control Panel). PL – Pilot Light to visually indicate presence of voltage on outside of switch enclosure.

CPT – Control Power Transformer used to step down line voltage to 120VAC to power shunt trip coil. SW Aux. – Normally closed contact when switch is closed. Opens as power switch opens.

Key Test – Key-to-Test switch used to operate shunt trip from the outside of switch enclosure. Can be used for trouble-shooting and inspection. Mechanically Interlocked Auxiliary Contact – Contact used to disconnect secondary source of power.

■– Terminal Block Connection Point. ● – Pre-wired Connection Points.

		Form No. PS
8-29-01	XXXXXX	Page 3 of 5
		BIF Doc# 1145