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E3NW-CRT
User’s Manual
Section 4
Using th
e Dist
ribut
ed Sen
s
or Unit
Section 4
Installing a DS-Bus Network
Installing a DS-Bus Network
This section describes how to install a DS-Bus network.
Precautions for Installing a DS-Bus Network
This section provides basic precautions for installing a DS-Bus network.
●
Precautions for Installing a Network
• When installing a DS-Bus network, observe proper safety measures and follow all
applicable standards. (Refer to JIS X5252 and Electrical Equipment Technical
Standards.) We recommend that you have an engineer who is familiar with the proper
safety measures and standards perform this work.
• Do not place any DS-Bus network devices near any devices that generate noise. If no
other suitable location is available, place the device or devices in a metal case or take
other measures to reduce ambient noise.
●
Precautions for Installing Communications Cables
• Check the following conditions for the communications cables in the network.
• Are there any disconnections?
• Are there any short circuits?
• Are there any problems with connector connections?
• When connecting to the communications connector on each device, be sure to insert
the wires until they lock into place in the communications cable connector.
• Separate communications cables from high-voltage power lines and install them in
ducts.
• Do not wire communications cables near devices that generate noise.
• Do not wire communications cables in high-temperature, high-humidity environments.
• Use in locations free of dirt, oil mist, and other foreign matter.
• There is a limit to the bending radius of communications cables. Refer to the
specifications for your communications cables for information on allowable bending
radii.
• You can connect up to eight Distributed Sensor Units to one Sensor Communications
Unit.
• Keep the total length of DS-Bus communications cables (L1 + L2 + ... + Ln) to within
30 m.
• Turn ON the DS-Bus termination setting switch for the last Distributed Sensor Unit on
the DS-Bus network. Turn this switch OFF for all other Distributed Sensor Units.
