APPX
Appendix 6 EMC and Low Voltage Directives
179
A
Each module
■ Power supply module
• Ground the LG and FG terminals after short-circuiting them.
• Use a power cable of 30m or shorter when connecting it to the module power supply terminal.
■ CPU module
When inserted into a compatible module, the SD memory card (NZ1MEM-GBSD) manufactured by Mitsubishi already
conforms to IEC 61131-2.
■ I/O modules
• Install a DC power supply and an I/O module inside the same control panel.
• Keep each DC power cable length to 30m or less.
• Take a surge protective measure, such as installing a surge suppressor, if the relay switches five times or more per minute.
■ Channel isolated analog-digital converter modules, channel isolated digital-analog converter
modules, channel isolated thermocouple input modules, and channel isolated RTD input
modules
Making a relevant module comply with the EMC and Low Voltage Directives requires the wiring as shown below:
• The AD75CK cable clamp (manufactured by Mitsubishi) allows up to four cables to be grounded together if the outside
diameter is approximately 7mm.
• For the wiring between the connector for external devices and the relay terminal block, use a shielded cable and ground it
to the control panel. In addition, the wire length should be 3m or less.
■ High-speed counter modules
• Install a DC power supply and a high-speed counter module inside the same control panel.
• Keep each DC power cable length to 30m or less.
• Keep the length of cables connected to external devices to 30m or less.
■ Flexible high-speed I/O control modules
• Install a ferrite core to the DC power cables connected to the flexible high-speed I/O control module and the DC power
cables connected to the controller. The ferrite core, ESD-SR-250, manufactured by NEC TOKIN Corporation is
recommended.
• Install a DC power supply and an flexible high-speed I/O control module inside the same control panel.
• Use a shielded cable as the DC power cable when it is extended out of the control panel.
• Keep the length of the cables between the output section and the external devices to 2m or less for open collector output or
10m or less for differential output.
• Keep the length of the cables between the input section and the external devices to 30m or less.
(1) Relevant module
(2) Connector for
external devices
(3) Inside a control panel
(4) Relay terminal block
(5) AD75CK
(6) Strip off the jacket.
(4)
(2)
(1)
(5)
(6)
(3)
20 to 30cm
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