Conventional Fire Alarms Pull Stations 270 Series The Edwards 278B/279B series non-coded, double-action fire alarm stations are UL listed, contemporary-styled Lexan stations. The 278B series feature terminals for field wiring connections, and the 279B series use 6” (150mm) wire leads for field wiring connections. FIRE ALARMS All types are available with single or double pole alarm contacts that can be normally open, normally closed or a combination of both. Either a key or tool (depending on station selected) is required to reset mechanism. Where a manual station is installed on a circuit that also includes smoke detectors, a resistor can be added in series with the alarm initiating contacts on the station so the operation of the station does not extinguish alarm LEDs on operated detectors. The 276-R and 276-RT resistor kits permit field installation of the series resistor on applicable stations. Features and Specifications • Double action models • Single or double pole contacts • Terminals or wire leads for field connections • Key lock or tool reset • Break glass operation • Surface or semi flush mounting • Red finish • Contemporary styling • Rugged Lexan construction • Latch action until reset • perating temperature range: 32°F to 120°F O (0°C to 49°C) For semi flush mounting, use a standard NorthAmerican 4 inch square box with single gang plaster cover having an overall minimum depth of 2-1/4 inches (57mm). For surface mounting use a 276B-RSB surface back box. Ordering Information Contact Ratings Description Field Connections screw terminals screw terminals screw terminals 6" wire leads Switch Contacts Station Reset Single-pole Alarm, Open Circuit Tool Operated Single-pole Alarm, Open Circuit Double-pole, Open and Closed Circuit Single-pole Alarm, Open Circuit Tool Operated Accessories Description Optional Resistor Kit (single-pole) Optional Resistor Kit (double-pole) Replacement Glass Rods Station Reset Key (supplied with all Key 276-K1 Reset Stations) Surface Back Box, Red 1For use in stations connected to smoke detector circuits. 560 Ohms, +/-5%; 2W.

Conventional Fire Alarms Pull Stations 270 Series Weights and Dimensions Approx. Shipping Weight (lb.) Front View FIRE ALARMS Cat. No. 278B Series With Optional Back Box 4" Square back box and plaster cover with single gang opening having overall min. depth of 2-1/4" (57mm) Cat. No's. 277B & 279B Series Without Back Box