The Siemens 6EP4136-3AB00-2AY0 is not a power supply — it is a SITOP UPS1600 DC uninterruptible power supply module that sits between a 24 V DC power source and the load, bridging power interruptions with stored energy from external battery modules. Its Ethernet/PROFINET interface, OPC UA server, and integrated web server set it apart from basic UPS modules by enabling remote monitoring, predictive maintenance, and controlled shutdown sequencing.

Beyond Basic Battery Backup

• Buffers 24 V DC loads up to 20 A during mains failure — PLC retains power, data is saved, actuators move to safe positions
• OPC UA server and web server expose UPS status, battery health, and runtime predictions to SCADA and cloud platforms
• PROFINET interface integrates directly with Siemens TIA Portal for configuration and diagnostics
• Selectable buffer time — configure how long the UPS holds before initiating a controlled shutdown of connected devices

Technical Specifications

System Integration

The UPS1600 requires external SITOP battery modules (sold separately) to store energy. In a typical configuration, a SITOP PSU6200 or PSU8200 power supply feeds the UPS1600, which in turn powers critical 24 V loads. During a mains outage, the UPS1600 seamlessly switches to battery power in microseconds — the PLC never sees the interruption.