6ES7155-6AR00-0AN0 Siemens plc is part of the SIMATIC ET 200SP distributed I/O system. It is a digital input/output module used for connecting various sensors and actuators in industrial automation applications. The module supports up to 32 digital inputs or outputs and is compatible with DC and AC voltage inputs/outputs. It communicates with the control system via PROFINET or PROFIBUS protocols. The 6ES7155-6AR00-0AN module offers reliable and flexible I/O connectivity for efficient control and monitoring of automation processes.