Rockwell Automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter - Manual (Page 145)

Publication 1769-UM001B-EN-P - October 2002
Application Examples 6-33
“This Controller” Parameters
Channel
The 1764-LRP supports three different pathways for messaging,
channels 0 and 1 are RS-232 ports and are functionally identical to
MicroLogix 1200 and MicroLogix 1500 1764-LSP controllers. The
1764-LRP also supports backplane communications through the
Expansion Communication Port (ECP) as illustrated below.
When ECP is chosen, you are able to select which slot position (1 to
16) the scanner resides in. The 1764-LRP processor can support up to
two 1769-SDN scanner modules with full messaging functionality.
TIP
You can use multiple 1769-SDN scanner modules in
a MicroLogix 1500 system, but you can only message
through the first two. Any other 1769-SDN scanner
can only be used for I/O scanning.