Phoenix Contact IB IL AO 4/U/0-10-ECO Handleiding (190 Pagina's)

Handleiding

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Mounting/removing devices

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11.4 Shielding concept

Shielding is used to reduce the effects of interference on the system.

11.4.1 Inline shielding concept

In the Inline system, shielded cables are used with the following terminals:

– Remote bus cables

– Connecting cables

– At terminals for analog signals (analog input, analog output, temperature record-

ing)

– At terminals for open and closed-loop control

– At communication terminals

– At detection terminals

– At programmable terminals

Observe the following points when installing shielding:

– Secure the shielding so that as much of the braided shield as possible is held under-

neath the clamp of the shield connection.

– Make sure there is good contact between the connector and base.

– Do not damage or squeeze the wires.

– When connecting the shielding, observe the specifications for the connector wiring.

11.4.2 Shielding when connecting analog sensors and actuators

– Always connect analog sensors and actuators with shielded, twisted pair cables.

– Connect the shielding via the Inline connector with shield connection (see Section

“Connecting shielded cables using an Inline shield connector” on page 129).

When connecting the cables, observe the instructions in the terminal-specific data

sheets.

– As a rule, shielding must only be connected directly to the PE potential on one side.

This is to prevent any occurrence of voltage equalization currents via the shielding.

– If necessary, integrate the shielding concept for analog I/O cables into the system

concept. For example, use a central FE shield connection at the control cabinet entry.

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