System-sensor B524BI Manuel d'utilisateur télécharger pdf (Page 2)

D450-15-00 2 I56-725-04

Installation Guidelines

All wiring must be installed in compliance with all appli-

cable local codes and any special requirements of the local

authority having jurisdiction, using the proper wire sizes.

The conductors used to connect smoke detectors to control

panels and accessory devices should be color-coded to re-

duce the likelihood of wiring errors. Improper connections

can prevent a system from responding properly in the event

of a fire.

For signal wiring (the wiring between interconnected de-

tectors), it is recommended that the wire be no smaller

than 18 gauge (1.0 square mm). However, wire sizes up to

12 gauge (3.3 square mm) can be used with the base. The

use of twisted pair wiring or shielded cable for the power

(+ and –) loop is recommended to minimize the effects of

electrical interference.

NOTE: Detector head power is supplied by terminals 1(+)

and 2(-). Therefore, the head will be part of this

isolation group.

If shielded cable is used, the shield connection to and from

the detector must be continuous by using wire nuts, crimp-

ing, or soldering, as appropriate, for a reliable connection.

Alarm system control panels have specifications for allow-

able loop resistance. Consult the control panel specifica-

tions for the total loop resistance allowed before wiring the

detector loops.

Check the zone wiring of all bases in the system before in-

stalling detectors. This includes checking the wiring for

continuity, correct polarity, ground fault testing, and per-

forming a dielectric test.

SCREWS (NOT

SUPPLIED)

BOX (NOT

SUPPLIED)

DETECTOR

BASE

SNAP ON

DECORATIVE

RING

Figure 1. Mounting base to electrical box:

A78-1577-06

LISTED COMPATIBLE CONTROL PANEL

CLASS A OPTIONAL WIRING

TWISTED PAIR RECOMMENDED

(+)

(–)

(+)

(–)

1 - COMM

IN (+)

2 - COMM

IN (–)

3 - COMM

OUT (+)

2 - COMM

OUT (–)

OTHER INTELLIGENT

DEVICES

1(+) 2(–) 3(+) 4(S)

Figure 2:

A78-1175-23

1 2 3 4

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System-sensor B524BI Manuel d'utilisateur Page 2

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