Key features and specifications of the 440R-N23117 safety relay may include:

Dual-channel inputs: It typically has two input channels to monitor safety devices, allowing for redundancy and enhanced safety.

Safety outputs: The relay provides safety output contacts that switch based on the status of the safety inputs. These contacts can be used to interrupt the power supply to the machine or perform other safety-related functions.

Safety Category: The safety relay typically supports safety category 3, according to the ISO 13849-1 standard. This means that it provides a high level of safety performance.

Diagnostic LEDs: The relay may have diagnostic LEDs to indicate the status of the safety inputs, outputs, and fault conditions, allowing for easy troubleshooting.

Reset Modes: It may support different reset modes, such as automatic/manual reset or monitored/manual reset, depending on the specific model.

Connection Options: The relay may offer various wiring options, including screw terminals or M12 connectors, for easy installation and integration into the safety system.