Some key features of the 1769-RTBN18 module include:

Compact design: It is designed to fit into the 1769 Compact I/O chassis, which saves space in the control panel.

Field wiring: The module uses a removable terminal block for easy field wiring and replacement.

Diagnostic LEDs: It has diagnostic LEDs on the front panel that indicate the status of each input channel and the module itself.

Common connection: The module has a common terminal connection for all the input channels, simplifying the wiring setup.

Flexible addressing: The module can be assigned an address within the CompactLogix system, allowing it to communicate with the main processor and other modules on the network.

The 1769-RTBN18 module is commonly used in industrial automation applications to monitor and control various digital inputs in a control system.