Rockwell Automation 1785-KA5P/B DHP COMM. ADAPATER MOD. - Manual (Page 19)

Installing the 1785ĆKA5
Communication Adapter Module
Chapter 2
2-8
Important: Each physical network link must have a unique LINK_ID
address.
The next section shows you how to mount the module in a 1771 I/O rack.
See page 2-9 for instructions on mounting the stand-alone version.
The 1785-KA5 mounts in any slot of an Allen-Bradley 1771 bulletin I/O
rack, except slot zero. If you are using a dropline/trunkline configuration,
mount the 1785-KA5 module within 10-100 feet of the DH+ trunkline. The
maximum cable length for DH485 trunk connections is 4,000 ft., with
individual stations “daisy-chained” together.
To install the 1785-KA5 module in a 1771 bulletin I/O rack:
1. Perform an orderly power down of the rack and its controlling PLC
processor.
ATTENTION: Remove system power before removing or
installing the module in the 1771 I/O chassis. Failure to observe
this warning could result in:
damage to the module’s circuitry
undesired operation and possible injury to personnel
2. Insert the optional keying bands provided with the 1771 I/O rack on
the backplane (The 1785-KA5 is keyed to protect against installing it
in the wrong I/O rack slot). Insert one band between keying positions
6 and 8. Insert the other between positions 12 and 14. The figure
below shows the keying positions:
Keying
Bands
19193
Mounting the 1785ĆKA5
Communication Adapter
Module in an I/O Rack