The SIEMENS ENERGY part 3SK12201AB40 is a SIRIUS Safety Relay Input Expansion designed to provide advanced input expansion for an additional 2-channel safety relay. This expansion module can be easily integrated into existing safety relay systems, offering increased flexibility and adaptability. With its robust construction and reliable performance, the 3SK12201AB40 ensures enhanced safety and protection in industrial applications. Expand your safety relay capabilities effortlessly with this advanced input expansion module from SIEMENS ENERGY.