Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 14)

14 Publication 1756-UM534B-EN-P - November 2010
Chapter 1 The 1756-RIO Module-Getting Started
Item Description
1 4-character scrolling display
2 Three status indicators
 RIO indicates the status of the network
 CLX indicates the status of the connection to the controller
 OK indicates the module’s own internal state
3 3-pin connector (blue hose) that connects to the remote devices
This is also known as the removable terminal block (RTB).
4 Inside-door label with error codes