User manual

Entravox complete package
18
In order to fulfil the general safety requirements for telecommunication systems complying
to VDE 0800 and prevent disturbances on the lines, ensure that the mains voltage and
SELV (TwinBus line) are laid separately. A clearance of 10 cm must be maintained for the
installation. In the case of a common line cabling, a separating webbing must be inserted
in the installation channels.
Bus lines a/b must not be terminated with terminal resistors.
Maximum line lengths
The loop resistance of each TwinBus line must not exceed max. 20 Ohm. This results in the
following maximum line lengths:
Considerations when renovating
Connection to the mains
Attention!
Malfunctions due to strong magnetic fields
No other devices with strong magnetic fields (contactors, transformers, etc.)
may be installed in the direct vicinity of the power supply unit and additional
devices. Malfunctions could be caused by induced voltage peaks.
Wire diameter in mm 0,8 0,6
Resistance in Ohm/m 0,0349 0,0621
Line lengths between TwinBus power supply unit 1 7573 and indoor
telephone
280 m 160 m
Line lengths between TwinBus power supply unit 1 7573 and door
unit (lighting)
60 m 30 m
Line lengths between TwinBus power supply unit 1 7573 and door
openers up to 8 V/1 A
50 m 30 m
Note:
In the case of existing YR cables, all the free wires on the TwinBus power sup-
ply unit must be laid as screening to a Terminal b.
Attention!
Equipment damage through overvoltage or short circuiting
Equipment damage can occur through overvoltage or short circuiting. Con-
nection must be made to a 230 V~±10% mains power outlet. The power must
be fed via an intrinsic line safety switch with max.10 A.
Entravox_Komplettpaket_8411_de.book Seite 18 Donnerstag, 5. Juni 2008 12:44 12