Potter OSYSU-2eBayProduct Overview The Potter OSYSU Series Outside Screw & Yoke (OS&Y) Valve Supervisory Switch is designed to monitor the open position of OS&Y gate valves. Available in two models the OSYSU 1 with a single SPDT (Form C) contact and the OSYSU 2 with two SPDT (Form C) contacts, these switches provide reliable valve status monitoring for fire protection systems. The OSYSU mounts to most 2 to 12 (50300 mm) valves, with select models fitting valves as

with screw terminals provided for power (+ and €“)

High Fidelity S/O Appliance Only

Indicators/UI: Works with the housing’s status indication (LED is provided by the assembled in-duct housing)

SV Back Box

output level

Optional Class A device wiring is available with the use of a module

the module draws 16 mA in the normal supervisory condition and 200 mA with the relays activated

Reversible

Expansion Signal Module Constant Supervision Adapter for 25 VRMS or 70

Designed for use with conventional FACPs

Nac Panel Module

They are primarily used to hold fire and smoke barrier doors open until released by a remote smoke detector or other switching device