Instruction Manual

Rockwell Automation Publication 1756-UM514C-EN-P - June 2014 13
Chapter 1
About the Module
What This Chapter Contains
This chapter describes the 1756-DHRIO and 1756-DHRIOXT modules and
what you must know and do before you begin to use it.
What the Module Does
The Data Highway Plus/RIO module supports the following types
of communication:
• Data Highway Plus™ (DH+) Messaging
• Control and Information Protocol (CIP) Messaging
• Remote I/O
You can send messages between devices on DH+ networks and devices on other
networks such as ControlNet, Ethernet, or other DH+ networks.
A 1756-DHRIO channel functions as a scanner by using remote I/O
functionality. The module transfers discrete and block-transfer data with remote
I/O devices. This module enables connection to multiple remote I/O adapters.
Topic Page
What the Module Does 13
Routing Limitations 14
Module Features 16
Prevent Electrostatic Discharge 19
Removal and Insertion Under Power 19