Smoke Alarm User Manual

Installation, Operation and Maintenance Manual
Page 4-12 Issue 1
February 2001
4.7 Installing the Intelligent Interface Module
The following paragraphs provide information necessary to install the Intelligent Interface Module (IIM).
Installation consists of mounting the module and wiring the module in to the system. All installation work
should be undertaken by factory trained technicians and installed in accordance with applicable
installation requirements. These being as follows:
(1) BS6266 : 1992 (Code of practice for Fire protection for electronic data processing
installations).
(2) Any other local installation requirements.
4.7.1 Wiring the RS-485 Network
The following is a list of procedures that require consideration when wiring the RS-485 Network.
(1) The 4 wire connection method is the preferred wiring because it provides the greatest
reliability. This method requires each pair of wires to be in separate conduit.
(2) The network cable must be twisted, shielded pair with a minimum gauge of 0.75 mm²
(18 AWG) and a maximum of 2.5mm² (12 AWG) wire.
4.7.2 Installing the Stand-Alone Intelligent Interface Module
The following is a list of procedures for installing a stand-alone IIM.
(1) Remove the IIM from the anti-static bag and carry out a visual inspection of the enclosure
and hardware.
(1) Ensure that the kit contains the following items:
2 - E.O.L Resistors ( 5.6k ohm 0.5 W)
1 – Ground Lug Washer
2 – Ground Lug Nut
1 – Stand-alone IIM in a key locked enclosure
CAUTION
All personal installing or servicing the IIM equipment must wear a grounding
strap when working with the module to avoid generating static electricity
which can destroy integrated circuits.
WARNING
DO NOT CONNECT OR DISCONNECT ANY WIRING ON THE IIM WITH THE
POWER SUPPLY CONNECTED.
(3) Mount the enclosure using No. 10 or ¼ inch hardware. This enclosure is designed to be
surface mounted.
(4) Connect the conduit to concentric ½ inch / ¾ inch knock-outs in the enclosure.
(5) Connect the 24 V DC power supply cable to the IIM.