The Siemens 6EP4136-3AB00-2AY0 is a SITOP UPS1600 uninterruptible power supply buffer module that bridges supply gaps on a 24 V DC bus. It sits between a primary power supply and the load, delivering 20 A continuous and handling peaks up to 60 A — enough to keep a multi-axis PLC rack or a string of I/O slices alive through a mains dip. Input range is 21...29 V DC, and the output follows input minus roughly 0.2 V, so the voltage drop across the module is negligible in normal operation. The PROFINET interface lets a controller read battery status, alarm conditions, and remaining buffer time without a separate signal cable.
Rated current, peak handling, and what governs the real load
The 60 A peak covers inrush from capacitive loads or simultaneous solenoid pick-up — the module does not fold back on short surges, which matters for a cabinet with several contactors or drives on the same 24 V rail. The 50 mm width and 125 mm depth fit a standard 35x7.5/15 DIN rail — one slot in a crowded panel.
Lifecycle, approvals, and sourcing posture
EMC compliance is EN 55022 Class B for emissions and EN 61000-6-2 for immunity, which covers industrial environments without additional filtering. The module uses battery-type energy storage; the matching battery module is listed as an electrical accessory.