General Information On The Conduit In Tcs Systems; Tcs Audio Systems; Principle Loop Resistance; Measurement Loop Resistance - TCS AMI Series Product Information

01/2013

General information on the conduit in TCS systems

TCS audio systems

The conduit of the lines is determined by structural conditions and is only limited by its
length.
 Observe when selecting the cable length:
the loop resistance must not exceed 20 Ω (table)
 To keep the max. permitted loop resistance, the
wire cross section can be doubled, that means,
that for one wire two cables are used (illustra-
tion). The lines have to be twisted.
 When using shielded cables:
Connect the shielding with each other and put it
on mass (b-wire) on one side at the power sup-
ply.
 Optional strand or star shaped wiring.
Table: loop resistances
Line length in m
10
20
30
40
50
60
70
80
90
100
150
200
250
300

Principle loop resistance

 None of the devices (front-door station, indoor
station or extended function) should be further
than 20 Ohm away from the power supply and
control unit!
TCS TürControlSysteme AG, TCS Hotline Germany: hotline@tcsag.de
Fax: +49 (0) 41 94 / 9 88 129  www.tcsag.de
15
Line diameter
0.6 mm
Loop resistance in Ω
1.28
2.55
3.83
5.10
6.38
7.65
8.93
10.20
11.48
12.76
19.13
25.51

Measurement loop resistance

Procedure for measurement:
 Switch off the 230 V / 50 Hz power supply and
control unit.
 Install a/b short circuit at the power supply and
control unit.
 Other devices are not disturbing the measure-
ment and can stay connected.
 Measure the resistance at the strand at a/b of the
last indoor or front-door station.
0.8 mm
0.71
1.43
2.14
2.86
3.57
4.29
5.00
5.71
6.43
7.14
10.71
14.29
17.86
21.43
Subject to technical changes.
PI_AMI1xx00_uk