Rockwell Automation 1784-PKTX_PKTXD Communication Card User Manual - Manual (Page 27)

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 PKTx 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 PKTx 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 150Ω terminator.
See Table 4.1.
30174-M
6-pin Phoenix connector with
switchable termination resistor
node terminated node not terminated
30174