Allen Bradley 1756 Series Communication Module

The Rockwell Automation remote I/O scanner it is have 4 character scrolling display and three status indicators that is 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. It is 3 pin connector that connects to the remote devices. This is also known as the removable terminal block (RTB) and 4 inside door label with error codes.

Dimensions 5.51 x 4.41 x 5.71 inches
Wire size 20 AWG
Power dissipation (Max) 2.5 watts
Isolation voltage 50 volts continuous
Backplane current 5 milliamps
Backplane current 450 milliamps