Mitsubishi Electronics FX3U User Manual download pdf (Page 13)

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Caution to conform with EC Directives

• Installation in Enclosure

Programmable logic controllers are open-type devices that must be installed and

used within conductive control cabinets. Please use the programmable logic

controller while installed within a conductive shielded control cabinet. Please secure

the cabinet door to the control cabinet (for conduction).

Installation within a control cabinet greatly affects the safety of the system and aids

in shielding noise from the programmable logic controller.

• Control cabinet

- The control cabinet must be conductive.

- Ground the control cabinet with the thickest possible grounding cable.

- To ensure that there is electric contact between the control cabinet and its door,

connect the cabinet and its doors with thick wires.

- In order to suppress the leakage of radio waves, the control cabinet structure must

have minimal openings. Also, wrap the cable holes with a shielding cover or other

shielding devices.

- The gap between the control cabinet and its door must be as small as possible by

attaching EMI gaskets between them.

*1. These wires are used to improve the conductivity between the door and control

cabinet.

Shielding cover

Shielded cable

Wires*1

EMI gasket

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Mitsubishi Electronics FX3U User Manual Page 13