Principle Loop Resistance; Measurement Loop Resistance - TCS ISW3030 Product Information

07/2015
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 never be
located more than 20 Ohm away from the power
supply and control unit (VS).
20 Ohm:
max. 160 m distance AS/IS-VS by 0.6 mm diameter
max. 300 m distance AS/IS-VS by 0.8 mm diameter
TCS TürControlSysteme AG, TCS Hotline Germany: +49 (0) 41 94/ 9 88 11 88
Mail: hotline@tcsag.de
13
cable 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

 Switch off the 230 V / 50 Hz of the VS.
 Install the a-b short-circuit at VS.
 Other devices do not disturb the measurement,
they can be connected.
 Measure the resistance at a/b of the last IS or
AS.
AS front-door station
VS power supply and control unit
IS indoor station
FE extended function
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
a, b short-
circuit here
Subject to technical changes.
ISW3030-0140 UK 2 A