Connecting the Network Interface Card
4-11
Publication 1784-UM527B-EN-P - October 2003
Terminating the Last Node
You must terminate both ends of your DH-485 network. If the PKT
x
is the last node on
your network, you must set the switch on the CP14 to terminate the link as shown below.
Refer to publication 1770-6.2.2, Data Highway/Data Highway Plus/Data Highway II/Data
Highway-485 Cable Installation Manual, for additional information about cable issues.
Connecting to Remote I/O Devices
Depending upon your application, you can use the PKT
x
card to communicate with a single
device or to multiple devices via a remote I/O link.
To connect the PKTx card to remote I/O, use Allen-Bradley 1770-CD or approved cable to
construct a custom cable. See publication ICCG-2.2 for a list of approved cables.
IMPORTANT
For proper operation, terminate both ends of a remote I/O link by
using external resistors. Use either an 82
Ω
or 150
Ω
terminator.
See Table 4.1.
30174-M
6-pin Phoenix connector with
switchable termination resistor
node terminated
node not terminated
30174
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