Phoenix Contact 2700540 A safety relay for emergency stop and safety doors is available with a range of capabilities including SIL 3, Cat 4, and PL e certifications. It can operate in either automatic or manual modes, with monitoring and start control options, as well as cross-circuit detection to ensure safe shutdown. The device has multiple current paths to facilitate easy installation and operation, and comes equipped with a plug-in screw terminal block for convenient connection.