The Siemens MSM-EXP Explosion Proof specifically is an explosion-proof model that has a D.P. D.T. switch. Both of the weatherproof and explosion-proof models will be shipped complete with back box. (Backbox is optional with other models, or you can mount to standard single-gang box.) The model is compatible with all Siemens Building Technologies, Fire Safety Division conventional zones, and can also be use in addressable zones when used in conjunction with a TRI-Series addressable module.
The Siemens MSM-EXP Explosion Proof is must equip in the first place with a S.P. S.T. switch rate at 10 amps @ 120 VAC and all connections should have a terminal block.
The MSM Series manual stations feature a rugged die-cast metal housing that satisfies both architectural and code requirements for manual fire alarm initiation devices. The MSM-Series features keyed reset using the same key as the control panels. The MSM Series models are low-profile with all surfaces either has to be painted or plated to inhibit corrosion. The boxes will have engraved letters and will be shipped with two reset keys and a broken glass rod (use of the rod is optional.) also, the options include double action, institutional, weatherproof, and explosion-proof.
These stations must have equipped with an S.P. S.T. switch rated at 10amps @ 120 VAC and all connections are made to a terminal block. The explosion-proof model has a D.P. D.T. switch. The weatherproof and the explosion-proof models will have to be shipped complete with the backbox. (Backbox is optional with other models, or you can mount to standard single-gang box.)