Technical Documentation: Fire Detectors used in hazardous areas
P-DET/EX/RCE/PM5/GKa/110995 17 Autronica Fire and Security AS
2.2 BZ-32, connection diagram, drawing BZ-049A (BZ-047A)
The diagram is separated in two main parts by a dot-dash-line. The components
located above that line is mounted in the hazardous area, and must be approved
for that purpose. At the projecting period it is important to place as little as
possible of the total equipment in the hazardous area.
Detectors which are operating independent of interface unit type BN-35/Ex
and are equipped with separate addresses, are marked with capital "D".
Conventional detectors, which need interface unit BN-35/Ex, are marked with
small "d" and all these detectors will have the same address number.
Note that, of course, all detectors must be approved for mounting inside
hazardous area, i.a. being marked B--/Ex.
Note also that the address number of BNB-35/Ex is given (n + 1) because this
unit (or BF-35/Ex) must be given the highest number of that branch.
Units loaded below the dot-dash-line are common Autronica fire alarm equip-
ments. The equipotential line is marked with PE and is connected to terminal
marked 4 on the zener barrier unit.
Note that the equipotential terminal, (marked 4 on the ac-barrier unit) must not
be connected to the system earth inside hazardous area. These two terminals
are, however, shorted inside the ac-barrier unit itself.
On branch no. 1 an interface unit type BNB-35/Ex is shown in detail for both
the input terminals "1 + 2" and "3 - 4", and the sub-loop, SL's connection to
terminals 5(-) and 6(+).
The sub-unit BNB-35/Ex is used for call-point BF-35/Ex and interface unit
BN-35/Ex which is the one shown on this drawing.
The manual call-point, BF-35/EX, has no possibility for sub-loop connection.
(The terminals 5 and 6 are used for the push-button, which is to be manually
operated.)
(The highest address number, which on the drawing BZ-049A is given to an
analogue addressable detector is "n", and unit BNB-35/Ex is given the address
number "n + 1")
Also remember that here must the equation; n ≤ 9 be satisfied.
Zener barrier unit type BZ-32/1 contains 1 unit type Z-667/Ex
Zener barrier unit type BZ-32/2 contains 2 units type Z-667/Ex
Zener barrier unit type BZ-32/3 contains 3 units type Z-667/Ex
Zener barrier unit type BZ-32/4 contains 4 units type Z-667/Ex
BZ-32,
connection
diagram
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