FSNF24-S US Belimo Actuator Fire & Smoke

Overview

The Belimo FSNF24-S US is a spring-return fire and smoke damper actuator engineered for life safety protection in HVAC systems. Operating at 24V AC/DC with 70 in-lb of torque, it ensures positive emergency fail-safe operation and status monitoring.

Features

• Spring return fail-safe mechanism for emergency safety
• Dual integrated SPDT auxiliary switches for position feedback
• Fast fail-safe running time under 15 seconds
• Reversible rotation direction via CW/CCW mounting
• Enclosure rated NEMA 1 / IP40 for safe installation

Specifications

• Nominal Voltage: AC/DC 24 V
• Torque: 70 in-lb [8 Nm]
• Control Type: On/Off
• Auxiliary Switches: 2 x SPDT
• Fail-Safe Running Time: <15 seconds
• Angle of Rotation: 95°

Applications

• UL555 and UL555S fire and smoke damper applications
• Emergency smoke management and containment systems
• Commercial HVAC duct isolation for safety