41071-1199 <90-00037>
P
AGE
3
T
he schematic diagram for the 41071 Alarm Display Unit is
shown in Fig. 1.
♦
Ground alarm inputs are connected to the three relay coils,
K1, K2, and K3 through the two banks of isolation diodes.
♦
When a relay is energized, the corresponding lamp lights and
the audible alarm sounds.
♦
The audible alarm sounds when there is an alarm if the remote
ON/ACO switch is in the ON position. You can change the
alarm volume by adjusting a screw on the right side of the
display box. When the ON/ACO switch is in the ACO (Alarm
Cut-Off) position, the audible alarm is disabled and the clear
lamp lights on the front of the display box.
♦
Each of the relays has a set of contacts for sending remote
alarms. A 500-ohm resistor (R5) is furnished to provide optional
strapping for any one of the relay outputs, if required.
♦
A push button on the remote switch box tests the operation of
the lamps and audible alarm.
CIRCUIT DESCRIPTION
