Key features of the 440R-N23120 relay may include:

Dual-channel safety inputs: This relay typically includes two separate channels for connecting safety devices, allowing for redundant and independent monitoring of the safety circuit. This redundancy ensures a higher level of safety integrity.

Safety outputs: The relay provides safety outputs that are used to control safety devices or to initiate a safety shutdown in the event of a safety breach or fault. These outputs are designed to help ensure that the equipment being controlled is brought to a safe state when necessary.

Diagnostic LEDs: The relay is likely to have diagnostic LEDs that indicate the status of the safety inputs, outputs, and internal monitoring functions. These LEDs provide visual feedback and help with troubleshooting and maintenance.

Reset options: The relay may offer different reset options, such as manual reset or auto-reset, depending on the specific safety requirements of the application.

Configuration and programming: The relay can be configured and programmed using appropriate software or programming tools provided by Allen-Bradley. This allows for customization and adaptation to the specific safety requirements of the machinery or equipment being controlled.