Here are some key features and specifications of the AB Relay 440R-S13R2:

Safety Functions: The relay is capable of implementing safety functions such as safety door monitoring, emergency stop, light curtains, and safety mat monitoring.

Inputs: It has 4 inputs that can be used for connecting safety devices such as safety switches, light curtains, or emergency stop buttons.

Outputs: The relay offers 3 normally open safety outputs and 1 normally closed auxiliary output. These outputs can be used to control safety-related devices like motor contactors or solenoid interlocks.

Safety Category: The relay is designed for applications up to Safety Category 4 as per EN ISO 13849-1 or SIL 3 as per IEC 62061.

Diagnostic Indicators: The relay has LED indicators to provide status and diagnostic information, making it easier to troubleshoot and monitor the safety system.

Integrated Testing: It supports built-in testing functions, allowing you to perform periodic testing of the safety circuit without compromising the safety of the machinery.