Siemens 3UF5100-0AJ00 Safety Relay Module 24V DC

Siemens 3UF5100-0AJ00 is an expansion module for the SIMOCODE-DP 3UF5 motor protection and control system. It adds 8 digital inputs and 4 digital outputs to the base device, enabling extended safety interlocks and control signals for motor circuits. This 24 V DC-powered variant is designed as part of the 3UF5 family and is used to monitor and drive safety-related I/O within a Siemens automation panel. The outputs can operate in monostable mode with a monostable basic unit or in bistable mode with a bistable basic unit, depending on the configuration of the installed base, providing flexible fault-safe signaling and reset behavior. Siemens documentation identifies the 3UF5100-0AJ00 as the 3UF5 expansion module variant, reinforcing its role as a scalable I/O add-on for motor protection schemes. Typical installations integrate this module to expand the safety input and output footprint of SIMOCODE-DP setups, supporting reliable monitoring of motor starters, overload relays, and safety interlocks within automated equipment. As part of the Siemens SIMOCODE-DP ecosystem, the 3UF5100-0AJ00 works with the 3UF5 series to coordinate protection logic, signaling, and actuator control across safety-rated channels.