Principle Loop Resistance; Measurement Loop Resistance - TCS IVW2221-015x Product Information

Table 1: Loop resistances
Length of the line
a-b/ M-P in m
10
20
30
40
50
60
70
80
90
100

Principle loop resistance

None of the devices (AS, IS or FE)
should be further than 8 Ohm away
from the power supply and control unit
(VS).
8 Ohm:
ca. 65 m distance AS-VS by 0.6 mm
diameter
ca. 115 m distance AS-VS by 0.8 mm
diameter
30
Line diameter
0.6 mm
Loop resistance in Ω
1.28
2.55
3.83
5.10
6.38
7.65

Measurement loop resistance

 Switch off the 230 V / 50 Hz of the
VS.
 Install a-b short-circuit at the VS.
 All other devices are not disturb-
ing the measurement and can
stay connected.
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
short-circuit
a, b here
kurzschlie-
ßen