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Table 1: loop resistances
cable length 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) is to be installed
each further than 20 Ohm away from the power
supply control unit (VS).
8 Ohm:
max. 65 m distance AS-VS at 0.6 mm diameter
max. 115 m distance AS-VS at 0.8 mm diameter
Max. number of IVW3012 in 6-wire operation
small and medium-
sized systems
VBVS05
larger systems
BVS20 + NGV1011
Note: The number of the front-door stations that can be
connected is limited and is described in their product infor-
mation!
TCS TürControlSysteme AG
E-Mail: hotline@tcsag.de • www.tcsag.de
28
0.6 mm
1.28
2.55
3.83
5.10
6.38
7.65
max. number of
IVW3012
6
max. number of
IVW3012
30
line diameter
0.8 mm
loop resistance in Ω
Measurement loop resistance
Rule:
Switch off 230 V / 50 Hz of the VS.
Install a-b short-circuit at the VS.
All other devices do not disturb the measurement
and can stay connected.
Measure the resistance at a/b of the strand of the
last IS or AS.
AS
front-door station
VS
power supply and control unit
IS
indoor station
FE
extended function
AS front-door station
VS power supply and control unit
IS indoor station
TÖ door opener
Subject to technical changes.
PI_IVW3012_0x10_uk.doc
07/2012
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
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