Rui; Class A Operation; Network; Copper Line Characteristics - Simplex 4100ESi Installation Manual

RUI

RUI cabling can be accomplished either through Class A or loop wiring, and Class B or spur wiring.
Using Class A wiring, transponder cabinets can communicate with the host panel even in the event of a
single open or short circuit somewhere in the loop.
Class B is not recommended.
AS 1670.1 specifies performance of the system if wiring (transmission path) faults occur. This usually
requires Class A wiring.
RUI wiring does not require end-of-line resistors, because each TIC communicates directly to the CPU.
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All wiring is between a minimum of 0.75mm² and a maximum of 2.5mm².
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All wiring is supervised and power-limited.

Class A operation

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The maximum cable distance around the loop is 760 meters. "T" spurs are not valid on Class A
wiring.
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Annunciators and transponder interface cards support loop operation when the system is Class
A wiring.
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Up to 31 transponder units can be controlled from the 4100ESi Control Panel.

Network

Copper line characteristics

Wired network, formerly called RS 485 Communication wiring, must be 0.75mm² shielded twisted
pair (STP), or 0.22mm² twisted pair (TP). Shielded cable is recommended for new installations. When
shielding is used, the shield is connected to the Earth, at the Left Port end of the span only.
You cannot use spurs, or T tapping on network cabling. Network wiring is point to point only.
The maximum line lengths between ports at 57,600 and 9600 bits per second are shown in the table
below.
Table 8. Maximum transmission distances for a wired network
Communication speed.
57,600bps
9,600bps

Fibre Optic Cable Characteristics

All fibre cables must be multimode, graded index. ST style connectors must be used. No physical strain
should be put on the cables. There must be no cable bends of less than a 50 millimeter radius.
Maximum wiring distance
0.75sq.mm STP. Maximum
capacitance between
conductors is 174pF/m.
3,000m
5,600m
0.22sq.mm twin. Maximum
capacitance between
conductors is 66pF/m.
2,300m
4,000m
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