The HC102 conventional manual call point designed for conventional fire alarm system for reporting fire or emergence condition by its PUSH IN/PULL DOWN handle latches Key lock available Operating voltage range: 9-28VDC Volts Pushing in and then pulling down on the handle activates the normally-open alarm switch. Once latched in the down position , the word" ACTIVATED" appears at the top in bright yellow, with a portion of the handle protruding at the bottom as a visible flag. Note: All wiring must conform to applicable local codes, ordinances, and regulations. Operation: The manual call points provide a textured finger-hold area that includes Braille text. In addition to PUSH IN and PULL DOWN text, there are arrows indicating how to operate the station, provided for non-English-speaking people. Pushing in and then pulling down on the handle activates the normally-open alarm switch. Once latched in the down position , the word" ACTIVATED" appears at the top in bright yellow, with a portion of the handle protruding at the bottom as a visible flag. Resetting the station is simple: insert the key, twist one quarter-turn, then open the station's front cover, causing the spring-loaded operation handle to return to its original position. The alarm switch can then be reset to its normal(non-alarm) position manually(by hand) or by closing the station's front cover, which automatically resets the switch. Loop design and wiring: The fire alarm control panel Zone wire can be connected to terminal loop(+), loop(-) unpolarized wire. If the manual call point is in the end of the zone wire, a 5.6K resistance should be connected to terminal loop(+),loop(-). Installation: Note: All wiring must conform to applicable local codes, ordinances, and regulations. Mounting indoor wall Attach mounting base to wall at 1.5 meter's high Connect field wiring to terminals To attach product to mounting base Secure product by tightening the one mounting screws in the front of the product housing. Specifications: Operating voltage range: 9-28VDC Volts Alarm resistance: 470ohm/1W Operating humidity range: 10% to 93% relative humidity, non-condensing Operating temperature range: -10℃ to 50℃ (14F to 122F) Dimensions: 140x104x45mm(LxWxH) Net Weight: 220g Package: 1 x Fire alarm call point 2 x Keys 1 x English manual