Overall, System Sensor’s SSM and System Sensor SSV120-6 series alarm bells are low current; high decibel notification appliances for use in fire and burglary systems or other signaling applications.
The SSM and System Sensor SSV120-10 series provide loud resonant tones. The SSM series operates on 24VDC and is motor-driven, while the System Sensor SSV120-6 series operates on 120VAC utilizing a vibrating mechanism. For indoor use, the SSM and SSV series mount to a standard four-inch square electrical box. For outdoor applications, a weatherproof backbox, model number WBB, is use. Also, the SSM and SSV series come pre-wired, to reduce installation time. The SSM series incorporates a polarized electrical design for use with supervision circuitry.
The model shall be an SSM or SSV Series alarm bell. Bells shall have underdone strikers and operating mechanisms. Gongs on said bells shall be no smaller than nominal 6˝/8˝/10˝ (specify size) with an operating voltage of 24VDC or 120VAC (specify by part number). Bells shall be suitable for surface or semi-flush mounting. Outdoor surface mounted installations shall be weatherproof (using an optional WBB weatherproof electrical box). Otherwise, bells shall mount to a standard 4˝ square electrical box having a maximum projection of 2½˝. Bells shall be located as shown on the drawings or as determined by the Authority Having Jurisdiction. Bells shall be listed for indoor/outdoor use by Underwriters Laboratories and the California State Fire Marshal and approved by Factory Mutual and MEA.
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