Overview
The Belimo FSNF120-S US is a line-voltage spring-return fire and smoke actuator designed for fast fail-safe response in HVAC safety systems.
Features
- Fast spring-return operation in less than 15 seconds
- Integrated dual auxiliary switches for remote status monitoring
- Tested to meet UL555 and UL555S life safety standards
- Pre-wired 1-meter plenum cable with conduit connector
Specifications
- Torque: 70 in-lb [8 Nm]
- Nominal Voltage: 120 V AC
- Control Signal: On/Off
- Auxiliary Switches: 2 x SPDT
- Running Time: <15 seconds (motor and spring)
Applications
- Fire and smoke dampers up to 12 sq. ft.
- Life safety smoke control and exhaust systems in commercial buildings



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