Mitsubishi Electric FX3U-128ASL-M User Manual page 13

FX -128ASL-M User's Manual
3U
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 electrical 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.
• Use the FX
*2. Zone defined in EN61131-2.
Separation defined in EN61131-2 for EMC LVD regulation decided depending on condition in
industrial setting.
Zone C = Factory mains which is isolated from public mains by dedicated transformers.
Zone B = Dedicated power distribution which is protected by secondary surge protection. (300 V or
Zone A = Local power distribution which is isolated from dedicated power distribution by AC/DC
• Please attach a ferrite core less than 200 mm from the FX
DN signal wires. The wire should be wound twice around the ferrite core. The ferrite core should be a
product equivalent to ZCAT3035-1330 by TDK Corporation.
• Please attach a noise filter to the 0 V and 24 V power cables. The noise filter should be a product
equivalent to SNR-10-223 by COSEL CO., LTD.
Shielding cover
EMI gasket
*1
Wires
-128ASL-M in Zone A
3U
less in the rated voltage is assumed.)
converters, isolation transformers, etc. (120 V or less in the rated voltage is assumed.)
Shielded cable
*2
as defined in EN61131-2.
3U
-128ASL-M side terminal block to the DP and
Standards
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