Omron CJ1W-ETN11 Operation Manual page 273

Network Installation
• Ground the external shield of the coaxial cable to 100 W or less using AWG 14 wire (cross-sectional area
2
of 2 mm ) or better and a ground cable length of 20 m or less. Ground each segment of the network at one
location only. Do not use the same ground for other equipment.
• The physical properties (e.g., minimum bending radius) of coaxial cable vary with the manufacturer. Follow
all recommendations and specifications of the manufacturer.
Environmental Precautions
• Do not install coaxial cables together with power cables.
• Do not install coaxial cable near sources of noise.
• Do not install coaxial cable in environments subject to excessive dirt, dust, oil mist, etc.
• Do not install coaxial cable in environments subject to high temperatures or high humidity.
Terminator Installation Precautions
• You must attach a Terminator to each end of the coaxial cable for communications to be possible.
• Insulate Terminators when attaching them to be sure they do not come into contact with metal objects.
Transceiver Installation Precautions
• Transceivers can be attached to coaxial cables only at intervals of 2.5 m. These locations should be
marked on the cable.
• Connection methods can vary with the manufacturer of the cable. Follow all recommendations and specifi-
cations of the manufacturer.
• Mount the transceiver onto an insulating object, such as a wooden board.
• Ground the transceiver through the shield of the transceiver cable and through the Ethernet Unit.
• Do not install transceivers near sources of noise.
• Do not install coaxial cable in environments subject to excessive dirt, dust, oil mist, etc.
• Do not install coaxial cable in environments subject to high temperatures or high humidity.
Transceiver Cable Installation Precautions
• Make sure that the transceiver cable is firmly and completely connected to both the transceiver and the
Ethernet Unit. Be sure that the slide latches are engaged.
• Do not install transceiver cables together with power cables.
• Do not install transceiver cable near sources of noise.
• Do not install transceiver cable in environments subject to high temperatures or high humidity.
Grounding
• Ground all devices requiring grounding to 100 W or less using AWG 14 wire (cross-sectional area of
2
2 mm ) or better and a ground cable length of 20 m or less. Electrical shock can occur between
ungrounded devices in the system. The lack of proper grounds can also corrupt data.
• Use one safety ground on each segment of the network.
• Inductive voltages can be generated due to lightning surges when coaxial cable is installed outdoors,
requiring special measures. Request outdoor installation from a professional.
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Appendix A