Omron NJ101-10 Series, User Manual

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4-2 Laying the EtherCAT Network
This section describes how to install EtherCAT networks.
4-2-1
Installation Precautions
Basic precautions for the installation of EtherCAT networks are provided below.
Precautions when Installing a Network
• When you install an EtherCAT network, take sufficient safety precautions and perform the installa-
tion according to standards and specifications. (Refer to JIS X5252 or to electrical facility technical
references .)
An expert well versed in safety measures and the standards and specifications should be asked to
perform the installation.
• Do not install EtherCAT network equipment near sources of noise.
If the network must be installed in an area with noise, take steps to address the noise, such as plac-
ing equipment in metal cases.
• When using a shielded cable with the shields on both ends of the cable connected to connector
hoods, ground loops induced by improper earthing methods may decrease noise immunity and
cause device damage. To prevent ground loops caused by differences in potential between device
earthing points, the reference potential between the devices must be stabilized. Design earthing ap-
propriately so that noise current does not flow to ground lines between the devices. For Earthing
methods, refer to the
NJ-series CPU Unit Hardware User’s Manual (Cat. No. W500) , the NX-series
CPU Unit Hardware User's Manual (Cat. No. W535) , the NX-series NX102 CPU Unit Hardware
User's Manual (Cat. No. W593) , or the NX-series NX1P2 CPU Unit Hardware User's Manual (Cat.
No. W578) .
Precautions when Installing Communications Cables
• Check the following items on the communications cables that are used in the network.
• Are there any breaks?
• Are there any shorts?
• Are there any connector problems?
• When you connect the cable to the communications connectors on devices, firmly insert the commu-
nications cable connector until it locks in place.
• Do not lay the communications cables together with high-voltage lines.
• Do not lay the communications cable near devices that generate noise.
• Do not lay the communications cables in locations subject to high temperatures or high humidity.
• Do not lay the communications cables in locations subject to excessive dirt and dust or to oil mist or
other contaminants.
• There are limitations on the bending radius of communications cables. Check the specifications of
the communications cable for the bending radius.
4 EtherCAT Network Wiring
4-12
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)