
405.1200.037.2 - Rel.: 2.21 of 25/02/2008
41-5
Connecting
the cable
shield
It is essential for the interface cables between the VT and the Device be
correctly shielded in order to ensure that serial communication occurs free
from all types of external interference. For this reason all the cables listed in
this manual absolutely must be shielded cables and the “D-sub” connectors
both on the VT side and the Device side must have metal or conductive
plastic shells.
The diagram below shows the correct way of connecting the shield.
The interface cable braiding must be electrically connected both to the shell
and the body of the connector at both ends of the cable.
If the connection operation cannot be carried out at the Device side due to
the particular type of serial connector, the braiding will have to be taken
outside the connector and connected to the earth terminal.
This operation must also be carried out if the body of the Device’s serial
connector, although of a standard type, is not electrically connected to the
NB: The braiding must
be electrically con-
nected both to the
connector body and
shell.
Connector body
Connective shell
Securing screw
Braiding
Connective shell
Содержание VT130W
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