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8 EMC DIRECTIVES
8.1.4 Example of measure against noise
NF
3) 3)
4)
SSCNET cable
Motion controller
Ethernet cable
(
Control panel A
3)
Control panel B
Extension base
Extension cable (QC B)
2)
1)
AC power
supply
24VDC
power supply
: AD75CK cable clamp
: Ferrite core (Recommended product: ZCAT3035-1330)
1) Ground the FG terminal of the Motion controller and 24VDC power supply module to the control panel.
2) Measure against noise of the power supply cable (24VDC twisted cable)
Wire the power supply cable as short as possible using the twisted cable.
Install a ferrite core at a position 20 to 30cm (7.87 to 11.81inch) away from the product.
3) Measure against noise of the extension cable (QC B)
Ground the cables at a position 20 to 30cm (7.87 to 11.81inch) away from the module with the cable clamp (AD75CK),etc.
When the cables are extracted from the control panel, ground the cables at a position 5 to 10cm (1.97 to 3.94inch) away
from the exit/entrance of the control panel with the cable clamp (AD75CK), etc.
4) Install a ferrite core in the secondary side of NF. (Approx. 1 turn)
5) Measure against noise of the internal I/F connector cable
Install a ferrite core at a position 20 to 30cm (7.87 to 11.81inch) away from the module.
Ground the cables at a position 30 to 40cm (11.81 to 15.75inch) away from the module with the cable clamp (AD75CK),etc.
When the cables are extracted from the control panel, ground the cables at a position 5 to 10cm (1.97 to 3.94inch) away
from the exit/entrance of the control panel with the cable clamp (AD75CK), etc.
Ethernet cable
(Shield tuisted pair of category 5 or more)
5)5)
5)
Manual pulse generator/Synchronous encoder/DIO
Internal I/F
connector cable
(1) Refer to Section 2 for the following cables.
• Ethernet cable
• RS-232 communication cable
• USB cable
• SSCNET
cable
• Extension cable
(2) Refer to APPENDIX 4.4 for the internal I/F connector cable.
Correctly wire the internal I/F connector cable. Use the shielded twisted pair
cable.
(3) In wiring inside the panel, the power line connected to the power or servo
amplifier and the communication cable such as bus connection cable or network
cable must not be mixed. If the cables are installed closely with each other for
wiring reasons, using a separator (made of metal) can make the cables less
influenced by noise.
Mixing the power line and communication cable may cause malfunction due to
noise.