Publication 1756-UM514B-EN-P - February 2003
Using the 1756-DHRIO Module in Remote I/O Applications 8-5
Cable Design Guidelines
Follow these cable design guidelines in your remote I/O network:
· Specify 1770-CD (Belden 9463) cable.
· Connect a remote I/O network using a daisy chain or trunk
line/drop line configuration.
· Verify that your system’s design plans specify cable lengths
within allowable measurements.
Trunk Line/Drop Line Considerations
When using a trunk line/drop line configuration, use 1770-SC station
connectors and follow these cable-length guidelines:
· The trunk line-cable length depends on the communication rate
of the link.
· The drop-cable length uses a maximum of 30.4 m (100 cable-ft.).
For more information about designing trunk line/ drop line
configurations, see the Data Highway/Data Highway Plus/Data
Highway II/ Data Highway-485 Cable Installation Manual, publication
1770-6.2.2.
IMPORTANT
The maximum cable length for remote I/O depends
on the transmission rate. Configure all devices on a
remote I/O network to communicate at the same
transmission rate.
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