ESA YT4G Visualyser, Hardware Manual

Page: 13 / 178

Chapter 3
Laying and shielding of cables
9
Visualyser - Hardware Manual - rev. 1.00
Laying and shielding of cables
Electronic appliances are frequently used in the command and
control systems of the home systems.
Electric interference caused by the functioning of these
appliances can jeopardise the correct functioning and the life
span of the electronic appliances present in the plant.
To allow the correct functioning of the electric and electronic
appliances the presence of interference must be reduced.
Laying the
cables
Remember to separate the measurement, control and commu-
nication cables from the power cables. Power cables laid near
to and parallel to the communication cables cause coupling
voltages that interfere with or destroy the electronic compo-
nents.
Cable shielding
For connection of the communication signals, it is necessary to
use suitable shielded cables (total shielding is recommended).
The shielding must be connected to the earth potential.
The earthing of the home system must be carried out in com-
pliance with all Standards in force.
3.