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Installation Guidelines
3.6
Interference-Free Connection of Monitors
These sections cover the following topics:
Information on selecting the components can be found in Catalog ST80.
3.6.1
Interference-Free Connection of a Monitor to the CP of the S5
Controller
Operator control and process monitoring systems from the COROS product
family can be used with monitor connections. The physical arrangement of
apparatus and the interference level of the environment are important for the
interference-free connection of monitors to SIMATIC S5 control systems.
The choice of monitor and video cables is governed by the following:
Operation of the
Where the monitor and PLC are installed under low-interference
Monitor and PLC
environmental conditions and operated over short distances, the monitor and
under
PLC are at almost the same ground potentials. Interference and ground loop
Low-Interference
disturbances are therefore not expected.
Conditions
In these cases, you can drive the monitor both via TTL signals and via analog
signals. Digital cables or single-shielded coaxial cables can be used to
transmit the video signals. Note that the braided shield of the coaxial cable
serves as the return conductor and must not be connected to the shield bar.
The monitor and communication processor (CP) are interconnected without
additional shielding and grounding.
Operation of the
Where the monitor and PLC are installed under harsh industrial conditions
Monitor and PLC
and operated over great distances, the devices may be at different ground
under Industrial
potentials. These different ground potentials may cause interference and
Conditions
ground loop disturbances.
3-30
Floating connection of cables at video inputs
Shielding and grounding concept
Whether the monitor and PLC are to be operated under low-interference
conditions or
under industrial conditions.
System Manual
C79000-G8576-C199-06
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