{"product_id":"siemens-6ep1961-3ba21-industrial-automation-module-reliable","title":"Siemens 6EP1961-3BA21 Industrial Automation Module - Reliable","description":"\u003ch2\u003eProduct Introduction\u003c\/h2\u003e\u003cp\u003eWhen system uptime is critical, the Siemens 6EP1961-3BA21 SITOP PSE202U redundancy module ensures reliable decoupling of two power supplies. This industrial automation module delivers up to 40A total output with an impressive 96.6% efficiency, reducing energy waste and operational costs. Designed for DC 24V networks, it provides a controlled, isolated output and a relay alarm contact for monitoring input voltage thresholds.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications Breakdown\u003c\/h2\u003e\u003cp\u003eThe Siemens 6EP1961-3BA21 is built for demanding 24V DC applications. Below are the key parameters from the official datasheet:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput voltage (DC)\u003c\/td\u003e\n\u003ctd\u003e24 … 24 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput voltage range (DC)\u003c\/td\u003e\n\u003ctd\u003e24 … 28.8 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated output voltage\u003c\/td\u003e\n\u003ctd\u003e24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated output current\u003c\/td\u003e\n\u003ctd\u003e40 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. aggregate current\u003c\/td\u003e\n\u003ctd\u003e40 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficiency\u003c\/td\u003e\n\u003ctd\u003e96.6 %\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower loss at rated load (typical)\u003c\/td\u003e\n\u003ctd\u003e34 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower loss no-load (max.)\u003c\/td\u003e\n\u003ctd\u003e1.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMTBF at 40 °C\u003c\/td\u003e\n\u003ctd\u003e6 471 654 h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGalvanic isolation\u003c\/td\u003e\n\u003ctd\u003eSELV per EN 60950-1 (relay contact)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection class\u003c\/td\u003e\n\u003ctd\u003eIII \/ IP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W×H×D)\u003c\/td\u003e\n\u003ctd\u003e70 × 125 × 120 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eThese specifications ensure the Siemens 6EP1961-3BA21 operates reliably in industrial environments with natural convection cooling from -25 °C to +60 °C.\u003c\/p\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe Siemens 6EP1961-3BA21 is ideal for critical control cabinets where uninterrupted power is mandatory. Common use cases include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDecoupling two 20 A SITOP power supplies to create a redundant 40 A supply for PLC and DCS racks.\u003c\/li\u003e\n\u003cli\u003ePowering safety-instrumented systems where a single supply failure could cause costly shutdowns.\u003c\/li\u003e\n\u003cli\u003eSupplying 24 V DC to motor drives, sensors, and actuators in manufacturing lines.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWith its 96.6% efficiency, this module minimizes heat generation and energy costs over the product lifetime, aligning with ROI-focused maintenance strategies.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eThe Siemens 6EP1961-3BA21 mounts swiftly onto a DIN rail EN 60715 35×7.5\/15. Use the provided screw terminals for input, output, and ground connections (0.33…10 mm² wire). Ensure top and bottom clearance of 50 mm each for adequate airflow. No side spacing is required. The relay alarm contact uses three additional screw terminals (0.5…2.5 mm²). No wall or S7 rail mounting is supported.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore ordering, confirm your system voltage is 24 V DC and that each power supply output does not exceed 20 A. The Siemens 6EP1961-3BA21 supports up to 40 A total, with derating of 3%\/K above 60 °C. As a trusted supplier, PLC Source PRO (via ubest101) stocks this exact model—ensuring genuine Siemens quality and fast delivery for your critical spares.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default","offer_id":44410250199139,"sku":"6EP1961-3BA21","price":209.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/6EP1961-3BA21_205874cf-99a8-4efe-ae72-7433976e0f5e.jpg?v=1785171084","url":"https:\/\/www.plcsourcepro.com\/products\/siemens-6ep1961-3ba21-industrial-automation-module-reliable","provider":"PLC Source PRO","version":"1.0","type":"link"}