Safe Signal Sprinkler OSY2 Supervisory Switch

The Safe Signal OSY2 Supervisory Switch is engineered for high-reliability monitoring of Outside Screw and Yoke (OS&Y) gate valves within fire protection systems. This dual SPDT contact switch ensures precise signaling if the valve is moved from the fully open position, facilitating seamless integration with fire alarm control panels or local notification devices. The NEMA 3R-rated enclosure features a rugged, weather-resistant design with a synchronized activation mechanism, preventing false alarms by requiring the valve stem to travel a specific distance before triggering the supervisory signal. Designed for tamper resistance, the OSY2 valve switch includes a cover screw with a specialized security wrench. Its adjustable mounting bracket accommodates a wide variety of valve sizes, ranging from 1 inch to 12 inches, making it a versatile field-replaceable component. The dry contact switch configuration allows for simultaneous monitoring of the valve state and local status indication without cross-interference, meeting NFPA 72 requirements for gate valve supervision.

• Dual SPDT Contacts: Provides two sets of Form C contacts for versatile wiring of supervisory circuits and auxiliary equipment.
• Field-Adjustable Trip Point: Allows for precise calibration to the valve yoke, ensuring the OS&Y monitor activates exactly when needed.
• NEMA 3R Protection: Built to withstand harsh environments, protecting internal terminal connections from moisture and dust.
• Universal Mounting: The slotted bracket design simplifies installation on various fire sprinkler gate valve configurations.
• Tamper-Proof Design: Features a specialized housing to prevent unauthorized access or adjustment after commissioning.

How do you wire an OSY2 switch for a fire alarm panel?
The OSY2 utilizes SPDT switch contacts. For a standard supervisory circuit, the "Usually Open" (NO) and "Common" (COM) terminals are used in conjunction with an end-of-line resistor to monitor the valve state and circuit integrity.

Can the OSY2 be installed on any gate valve?
It is specifically designed for OS&Y type gate valves where the stem moves out of the valve body when opened. It is compatible with pipe diameters from 1” up to 12”.

What is the purpose of the dual contacts on the OSY2?
The two sets of contacts allow one circuit to send a signal to the Fire Alarm Control Panel (FACP) while the second circuit triggers a local horn-strobe or remote monitoring station.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.