6 INSTALLATION AND EXTERNAL WIRING
6.2 External Wiring
39
6
Compliance with the EMC and Low Voltage Directives
Take the following measures for compliance with the EMC and Low Voltage Directives.
• Always attach a ferrite core on the DC power supply cable to be connected to the flexible high-speed I/O control module
and the one to be connected to a controller. Using the ESD-SR-250 ferrite core manufactured by NEC TOKIN Corporation
is recommended.
• Install a DC power and the module in the same control panel.
• Use a shielded cable for the DC power when the DC power supply cable is extended out of the control panel.
• The length of the cables to be connected to the output section and external devices must be 2m or shorter for open
collector output or 10m or shorter for differential output.
• Keep the length of the cables between the input section and the external devices to 30m or less.
• Use a shielded twisted pair cable and ground the shielded part of the cable to the control panel with the AD75CK cable
clamp manufactured by Mitsubishi.
For details on the AD75CK, refer to the following.
AD75CK-type Cable Clamping Instruction Manual
• Take the following measures to reduce noise when wiring connectors for external devices.
■
Wiring to use a shielded cable
The following figure shows a wiring example for measures to reduce noise using the A6CON1.
(1)
Shorten the distance between the connector and shielded cable as far as possible.
(2)
Ground a FG cable of 2
or thicker in the minimum distance. Securely ground the cable in the control panel on the module side.
(3)
Shielded cables
AD75CK
Flexible
high-speed I/O
control module
20 to 30cm
Inside of control panel
A6CON1
(3)
(2)
(1)
Summary of Contents for MELSEC-L Series LD40PD01
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