Audible Alarm Panel, Functional Description

TM 11-5895-878-14&P

0.1 to 10 seconds.) When the contacts are closed -48

5-5. Audible Alarm Panel, Functional Description

vdc is applied through a 1.5 Kohm dropping resistor to a

sonarlert, the electronics flasher, and alarm lamps DS1

a. There are two audible alarm panels, one

and DS2.

connected to the black: Major/Minor Alarm Panel, the

c. The solaralert provides an audible sound. The

other connected to the red Major/Minor Alarm Panel.

electronic flasher operates, opening and closing

The panel is powered by the - 48 vac power system of

contacts 4 and 7. When contacts 4 and 7 are closed,

the associated side of the P&T.

alarm lamp DS1 and DS2 light.

b. The -48 vdc power is connected through

d. When relay K1 contacts open the -48 vdc is

terminal 1 of TB1 to pin 7 of series solid state recycle

removed, and the audible sound along with the flashing

time relay K1. When an alarm is sensed, ground (+48

lights stop. The panel may be tested by depressing

vdc) is applied through terminal 2 of TB1 to pin 2 of

switch SW1. The switch is connected to the panel

relay K1. The relay is activated, and its time delay

ground (+48 vdc) through terminal 3 of TB1.

action begins closing and opening contacts 1 and 3.

(The contact close and open times are adjustable from

5-2