The 440R-EM4R2D safety relay module offers four normally open (NO) safety input contacts and two normally open (NO) safety output contacts. It is commonly used to monitor and control safety circuits in machinery and equipment to ensure safe operation. The relay is capable of monitoring various types of safety devices, such as emergency stop buttons, safety interlocks, light curtains, and safety mats.

This safety relay module supports monitoring and controlling different safety functions, including safety gates, two-hand control, enabling switches, and muting applications. It provides outputs that can be used to stop or disable machinery when unsafe conditions are detected, helping to prevent accidents and protect personnel.