Take a look at a list of  The most requested parts for Remote I/O.

This site is comprised of information to help everyone understand the fundimentals of the Modbus Plus and Remote I/O networks and systems.

This information is useful in designing or redesigning systems as well as troubleshooting and repairing them.

However; if you have any questions regarding either network, or any Modicon product, please contact me, Bob Culley, at Delta Automation, Inc.  www.deltaautomation.com 
Phone 1-888-PC DELTA or 804-236-2800 and fax at 804-236-2900
My email is bobculley@deltaautomation.com

Also at this time there are many articles in the Delta newsletters, located on Delta's website concerning these networks. These articles contain many tips and helpful hints on them.