IGD 2-Wire Systems, Installer'S Manual

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20
Interconnecting Modules On A Data Highway
TOCSIN
650 OR
750 Series
Controller
L1
L2
Port 1 to 4
For Safe Area Detectors Use 2 Core
Cable 1.0 to 2.5mmSQ Cable
Depending on Distance.
Interconnecting Highway Cabling
For 2-Wire Addressable Systems:
Ensure Cable Screens are Correctly
Terminated and cables are stripped
to the enclosed guide.
For ATEX Units Typically Use 2 Core
SWA Cable 1.0 to 2.5mmSQ
Depending on Distance
See Cable Calculator for Cable Core
Size vs Distance VS Number of
Devices
End of Line Terminators Must
be Fitted at the Last Module in
Line as Indicated Across the
L1 and L2 Terminals.
Terminators are Shipped With
All Control Panels.
Spare Terminators Can be
Ordered Using Part Number :
TOC-750-TRM.
Failure to Fit Terminators Will
Prevent System Operation
Tocsin 750 Series Annunciator Modules are interconnected as follows using two core cable.
The system is designed to operate using screened cable. In some circumstances, for instance
in ATEX Zone 1 areas a protective armour may be desirable to provide mechanical protection.
The system provides both power and digital communication over the single pair of wires. The
system is also polarity insensitive although best practice would be to connect L1 to L1 to L1
and L2 to L2 to L2 etc for continuity. It is necessary to fit an IGD terminator at the last device
as indicated for operation of the system. In-coming and out-going screens must be connected
as indicated, ensuring screening continuity. IGD provide screw-less terminal blocks for this
purpose. Ancillary cabling to push buttons, beacons, sounders etc should also be screened.
Cable Screen or
Drain Wire
Cable Screen or Drain Wire
Screen continuity terminal block