Some key features of the 440R-N23135 relay may include:

Dual-channel safety relay: The relay has two independent safety channels that can be used for redundancy and fault tolerance in safety circuits.

Inputs and outputs: The relay typically has multiple input and output options to connect safety devices, such as safety switches, safety mats, and sensors.Diagnostic and status indicators: The relay may have LEDs or other indicators to display the status of each channel, allowing easy troubleshooting and monitoring of the safety circuit.

Reset options: It may offer different reset options, including manual reset, automatic reset, or monitored manual reset, depending on the safety requirements of the application.

Safety certifications: The 440R-N23135 relay is likely to have various safety certifications, such as SIL (Safety Integrity Level) ratings or performance level ratings, indicating its compliance with international safety standards.