The Siemens MS-51 is a conventional single-action manual pull station for conventional fire alarm control panels, initiating an alarm through a spring-loaded contact on the initiating device circuit.

Compliance

• UL 38 (manually actuated boxes)
• ULC listed
• NFPA 72 compliant

Key features

• Conventional initiating device circuit operation
• Single-action pull-down lever
• Locks in position after activation and resets with a key
• Spring-loaded contact switch for reliable signaling
• Mounts to single-gang box or the SB-5R surface back box
• Durable housing for schools, offices and industrial sites

Siemens manual stations let occupants initiate an alarm by hand and anchor the manual fire alarm path required by NFPA 72 at exits and along egress routes. Mechanical pull-down operation latches until reset with a key, supporting reliable activation in schools, offices, industrial sites and assembly occupancies.

Verify panel and device family compatibility before ordering.