Guidelines for Selecting Cables
The following guidelines should be observed when selecting cables for use in an industrial environment:
Use cables with twisted outgoing and return conductors.
For analog signals, cables with shielded out and return conductors and braided shields should be used.
Use cables with double shielding for analog process signals outside of buildings.
For high frequency radiated interference (5-30 Mhz), use cables with braided shields.
Use shielded cables for interfering signals (class 4); additional shielding by installing cables through metal tubes or metal cable channels.
Example for class 1 signals
Example for the implementation of cables for class 1 signals (sensitive)
Example for class 2 signals
Example for the implementation of cables for class 2 signals (slightly sensitive):
Example for class 3 signals
Example for the implementation of cables for class 3 signals (slightly interfering):
Example for class 4 signals
Example for the implementation of cables for class 4 signals (interfering):
