Omron CJ1W-ETN11 Network Card User Manual


 
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Network Installation Appendix A
Ground the external shield of the coaxial cable to 100 W or less using AWG 14 wire (cross-sectional area
of 2 mm
2
) 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
2mm
2
) 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.