Siemens 6EP1961-3BA21 SITOP 24VDC Power Supply

Siemens 6EP1961-3BA21 SITOP PSE202U is a 24 V DC redundancy module that interconnects two SITOP power supplies to deliver a dependable dual-path 24 V output for industrial control systems. It provides a total 40 A rating, split across two independent outputs with up to 20 A available on each path to decouple two SITOP power supplies and improve uptime for critical loads. Designed for SITOP installations, it accepts a 24 V DC input and uses a green LED indicator to show status, helping technicians verify power reliability at a glance. In harsh environments, the device supports operation up to +70 °C with a derating of 3% per Kelvin, ensuring predictable performance as ambient temperature rises. The 6EP1961-3BA21 designation corresponds to the SITOP PSE202U redundancy module, 24 V DC/40 A, explicitly intended to protect against single-power-supply failures and maintain continuous operation in automation cabinets.