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

General information on the conduit in TCS audio systems

The conduit is determined by structural conditions and is limited only 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
cross-section of the wire can be doubled, that
means, for one wire two lines are used (illustra-
tion). The lines must be twisted.
 When using shielded lines: connect the shields
with each other and connect one side to ground (b-
wire) at the power supply.
 Optional strand or star formed wiring.
Table: loop resistances
cable length in m
10
20
30
40
50
60
70
80
90
100
150
200
250
300

Principle loop resistance

None of the devices (AS, IS or FE) should be fur-
ther than 20 Ohm away from the power supply and
control unit (VS).
TCS TürControlSysteme AG, TCS Hotline Germany: +49 (0) 41 94 - 9 88 11 88
Fax: +49 (0) 41 94 - 9 88 129  E-Mail:
14
0.6 mm
1.28
2.55
3.83
5.10
6.38
7.65
8.93
10.20
11.48
12.76
19.13
25.51
hotline@tcsag.de
cable diameter
loop resistance in Ω

Measurement loop resistance

Procedure of measuring:
 Switch off the 230 V / 50 Hz of the 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, they can stay connected.
 Measure the resistance at a/b at the last indoor or
front-door station
3/2013
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_PAK_uk 1A