Publication 1756-UM001G-EN-P - January 2007
Communicate over Networks 43
Universal Remote I/O
Communication
For universal remote I/O communication, use a 1756-DHRIO module.
When a channel on the 1756-DHRIO module is configured for remote
I/O, the module acts as a scanner for a universal remote I/O network.
The controller communicates to the module to send and receive the
I/O on the universal remote I/O network.
ControlLogix Universal Remote I/O Communication Overview
Functions Required
Module
• Establish connections between controllers and I/O adapters.
• Send data regularly.
• Distribute control so that each controller has its own I/O.
• Communicate with a supervisory controller.
1756-DHRIO
• Use an RIO scanner.
• Communicate with as many as 32 RIO adapters.
• Support HART (Highway Addressable Remote Transducer) devices.
• Use scheduled connections to update data on a ControlLogix
controller.
1757-ABRIO
Universal Remote I/O Network
ControlLogix Controller
PLC-5 Controller in Adapter Mode
1746-ASB and I/O Modules
1771-ASB and I/O Modules
1794-ASB and I/O Modules
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