07/2015
13
TCS TürControlSysteme AG, TCS Hotline Germany: +49 (0) 41 94/ 9 88 11 88
Subject to technical changes.
Mail: [email protected]
ISW3030-0140 UK 2 A
Table: loop resistances
cable length
in m
cable diameter
0.6 mm
0.8 mm
loop resistance
in Ω
10
1.28
0.71
20
2.55
1.43
30
3.83
2.14
40
5.10
2.86
50
6.38
3.57
60
7.65
4.29
70
8.93
5.00
80
10.20
5.71
90
11.48
6.43
100
12.76
7.14
150
19.13
10.71
200
25.51
14.29
250
17.86
300
21.43
Principle loop resistance
Measurement 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).
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.
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
AS front-door station
VS power supply and control unit
IS
indoor station
FE
extended function
a, b short-
circuit here
