4. MASTER STATUS MODULE
This module will continuously monitor up to 8
remote signals f o r operating alarms and
emergency alarms such as: pressure switches,
low liquid levels, high or low gas pressures,
etc. If any of the signals being monitored goes
into an alarm condition, a red light will come on
and an audible alarm will sound.
M C D C & M R
t S U P P L Y S T A I L S
( = roculad tow
. . . a —ALARM INDICATORS
maw.
t o , Z
O M R . M R .
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O R M I N
O R R O W E
MASTER STATUS MODULE
ALERT-1 is factory-calibrated for"Normally Closed Circuit" (NC) operation so that the alarm function
will be initiated on an open circuit. In this mode the alarm system will signal both alarm conditions
and system malfunctions.
P I G TA I L
T E R M I N A L B L O C K
5. A L A R M BOX
These modules are pluged into the
motherboard of the alarm box once
it has been installed in the wall.
FUSE
T R A N S F O R M E R
M O T H E R B O A R D
The box itself (Fig. 1), houses the pigtails that deliver the gases (vacuum) into the alarm and in
addition contains:
• transformer
• main fuse
• overload protection unit
• terminal block (115VAC)
• motherboard
2
