Comelit MT SB2 03 Manual Tecnico página 28

GROUP S.P.A.
Maximum distances and characteristics of the conductors.
Connection of the pieces of apparatus is of the non-polarised type. Use of conductors with different characteristics than the ones
prescribed does not guarantee that the system can reach certain distances or good quality of the video signal, so only use the cables
described in the following tables.
TABLE 1 distances for Simplebus1 and Simplebus2 video entry phone systems.
Type of cable MAX distance between
mixer 4896 and internal
extension in Simplebus2
video entry phone systems
Comelit Cable Art. 4577
cross-sect. 1 mm 2 (Ø 1.2 mm)
Comelit Cable Art. 4576 cross-
sect. 0.5 mm 2 (Ø 0.8 mm)
Two-wire cable cross-sect.
**
1.5 mm 2 (Ø 1.4 mm)
Braided and shielded cable
*
cross-sect. 1 mm 2 (Ø 1.2 mm)
Twisted telephone cable cross-
*
sect. 0.28 mm 2 (Ø 0.6 mm)
UTP5 cat 5 AWG 24 cable
*
cross-sect. 0.2 mm 2 (Ø 0.5 mm)
Two-wire cable cross-sect.
**
0.5 mm 2 (Ø 0.8 mm)
*
When a multi-pair cable is used, only use one of the pairs available. Should it be necessary to reduce the resistive drops, use the single
pair as a single wire.
** Should a multi-core cable be used, only use two of the wires available and never use wires in parallel.
TABLE 2 distances for door entry phone systems.
Cross-section of the
conductor
0.28 mm 2
(Ø 0.6 mm)
0.5 mm
2
(Ø 0.8 mm)
1 mm 2
(Ø 1.2 mm)
1.5 mm 2
(Ø 1.4 mm)
MT SB2 03 26
MAX distance between
extension terminal 1214/2
and monitor
A
200m
X
150m
120m
100m
80m
120m
MAX distance between external
unit and Art. 4897
E
300 m
350 m
400 m
400 m
MAX distance between
4833/A or external unit
and 1214/2 in Simplebus1
video entry phone systems
B C
60m X
60m 150m
40m 100m
30m 80m
40m 150m
40m 150m
40m 100m
MAX distance between
Art. 4897 and telephone
F
150 m
150 m
200 m
200 m
MAX distance between
external unit and internal
extension in Simplebus1
systems
D
X
400m
400m
400m
400m
400m
400m
MAX distance between external
unit and telephone
G
400 m
400 m
400 m
400 m