4
05/2006
General notes on the cabling in TCS video systems
Terms for 5 wire and 6 wire operation
6 wire operation
standard operating mode. Video operation where two separate
earths (b and M) are being used.
5 wire operation
special operating mode. Video operation where b and M are joined to
a single earth.
6 wire operation
The cabling depends on the building situation and is only limited by its length.
•
When selecting the cable length consider: the loop resistance M-P must be max. 8
Ω
(table 1).
•
For loop resistance > 8
Ω
: provide for multiple wiring of the lines (twisted pairs).
•
choice of line or star wiring
•
Do not use more than 6 video in-house stations per line. For systems with more video
in-house stations provide for the use of video distributors (VT02, VT04).
•
up to 64 front-door stations and an almost unlimited number of in-house stations can be
connected polarity-free (a/b) to a system. (use suitable power supply and control unit.)
Table 1: Loop resistances
Line diameter
Line length
M-P
in m
0.6 mm
0.8 mm
Loop resistance
in
Ω
10
1.22
0.69
20
2.45
1.38
30
3.67
2.07
40
4.90
2.76
50
6.12
3.44
60
7.35
4.13
70
4.82
80
5.51
90
6.20
100
6.89
5 wire operation
Number of monitors
in the system
max. permissible loop
resistance
in
Ω
24 4,8
12 6,3
6 8
TCS TürControlSysteme AG
•
Geschwister-Scholl-Str. 7
•
39307 Genthin
Subject to change without notice.
Phone.: +49 39 33 / 87 99 10
•
Fax: +49 39 33 / 87 99 11
•
www.tcs-germany.com
PI_GB_VPES_VPDS_Art0016079_2v0.doc
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