278B-1120 EDWARDS SIGNALING PRODUCTS, 278B-1120 Datasheet - Page 2

• Manufacturer Part Number: 278B-1120
• Description: 99H6777
• Manufacturer: EDWARDS SIGNALING PRODUCTS

Operation
To initiate an alarm it is necessary to first lift the upper door marked
“LIFT THEN PULL HANDLE”, and then pull the alarm handle.
The alarm handle latches in the pulled position until the station is
manually reset. To reset, the station is opened using a Cat. No.
276-K1 key supplied with the station, or a tool; the toggle switch
is restored to it’s normal position, the break glass rod is replaced
and the station is reclosed.
Engineering Specifications
Furnish and install where indicated on plans, Cat. No. (Select one
of the following:)
(278B series double action manual stations with screw terminals)
(279B series double action manual stations with six inch (150mm) wire
leads)
for connection of installation wiring. All stations shall be of the
noncoded break glass type.
The stations shall be constructed of red lexan with white raised
letters. The alarm handle shall be marked “PULL FOR FIRE”, to
provide simple, concise instructions for activation of station by
the general public. It shall be necessary to first lift an upper door
marked “LIFT THEN PULL HANDLE” to gain access to the alarm
handle.
Pulling the alarm handle shall break a glass rod and activate a
toggle switch which shall cause the handle to latch in the alarm
position. Momentary push button type switches shall not be ac-
ceptable. To reset the station it shall be necessary to open the
station using (select one) (a key) (a special tool), restore the toggle
switch to its normal position and replace the glass rod. Stations
shall be UL listed.
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Technical Specifications
Accessories
Contact Ratings: General Alarm Switch/Keyswitch
Single Pole
Double Pole
Cat. No. 276-R and 276-RT Series
resistor kits (optional)
(For stations connected to smoke
detector circuits)
Station Housing
Weight
276-GLR
276-K1
276-RT*
276B-RSB
*See Ordering Table to determine Kit for specific stations.
WARNING: These devices will not operate without electrical power. As fires
frequently cause power interruptions, we suggest you discuss further safeguards
with your local fire protection specialist.
Replacement Package of Glass Rods
Station Reset Key, Supplied with all Key Reset Stations
Series Resistor Kit with Terminal Block.
Surface Back Box, Red.
Not to be used for installation purposes.
D A T A S H E E T
3.0 Amps, 30 Vac, Resistive Load
1.0 Amps, 28 Vdc, Resistive Load
1.5 Amps, 30 Vac, Resistive Load
1.0 Amps, 28 Vdc, Resistive Load
560 Ohms, ±5%
2 W
Red Lexan 940 with White Letters
1 lb (0.4 kg)
S85001-0227
Issue 4.1