COMMON FACILITIES CARD (OPTIONAL)
Is used in multi-channel systems to provide alarm outputs which are common to all cards within
the same enclosure, and may be inserted into any slot within the enclosure.
The facilities card collects alarm information from all the connected cards and provides common
alarm functions as follows:
a
Low alarm indicator
b
Low alarm relay
c
High alarm indicator
d
High alarm relay
e
Overrange alarm indicators
f
Overrange alarm relay
g
Fault alarm indicators
h
Fault alarm relay
i
Common alarm sounder
j
Common accept/reset switch (Gas Modules Only)
k
Power ON indicator
l
Module removed sounder alarm
TERMINAL MOTHER BOARD
Houses the field terminals for the connection of external equipment i.e. sensor, shut-off valves,
mimic panels etc. Also in multi-channel systems is used to connect the various alarm and facilities
cards together.
INSTRUMENT ENCLOSURE
A standard 19“ wide rack houses up to 14 cards, various types of enclosure being available to suit
the users requirements, from single to multiples of 14.
ALARM INDICATORS
Red long-life L.E.D.’s flashing - steady when accepted.
Two levels Low and High adjustable between 10% and 85% F.S. (upper limited may be restricted to
60% F.S.) (Gas Alarm Modules)
FAULT ALARM INDICATORS
Amber long-life L.E.D.
Initiated in the event of a sensor cable fault (short or open circuit).
Constant sounder.
Sounder and indicator latched until fault cleared.
4
