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Technical specifications for 6EP1961-3BA21
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Manufacturer:Siemens
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Product Category:PLC Systems
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Spare Part Number:6EP1961-3BA21
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Estimated shipping dimensions:7x12.7x13.5cm
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Weight:0.42 kg
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Tariff Code:8537101190
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Counliy of origin:Germany
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Output current:40 A
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Efficiency in percent:96.6 %
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Output voltage at DC rated value:24 V
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Voltage curve at output:Controlled, isolated DC voltage
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Input voltage:24 ... 28.8 V
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Supply voltage:24 ... 24 V
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Type of the power supply network:DC voltage
Information
Overview
Manuals
Common Applications
Product Precautions
The 6EP1961-3BA21 is a SITOP PSE202U redundancy module operating within the SITOP power supply product line . This hardware component functions with a rated input and output voltage of 24V DC and manages a maximum total throughput current of 40A .
- Safe decoupling and seamless switching ensure 24/7 uptime for critical loads
- Adjustable 20V-25V monitoring with LEDs and relay contacts for instant PLC alerts
- Up to 96.6% efficiency lowers cabinet heat and ensures stable harsh-environment running
The physical enclosure features an IP20 protection rating and is configured for direct installation onto standard DIN rails. Regarding compliance updates, standard Ex explosion-proof certification is no longer available for this specific unit model. The module is applied in standard industrial electrical control cabinets to maintain continuous 24V DC power availability for control loops and automation infrastructure.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Siemens 6EP1961-3BA21 SITOP PSE202U Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Automotive Manufacturing
Prevents production line stoppages due to power failure during critical assembly stages. Powering PLC systems and robotic arms in automated welding and painting shops.
Semiconductor & Electronics
Avoids massive product scrapping caused by momentary voltage drops in cleanrooms. Ensuring uninterrupted 24V power for wafer transport robots and lithography control tracks.
Pharmaceutical & Life Sciences
Guarantees compliance and temperature stability during precise chemical/biological synthesis. Supplying redundant power to bioreactor controllers and automated vaccine packaging systems.
Oil and Gas
Ensures functional safety and remote telemetry monitoring in highly hazardous areas. Powering Emergency Shutdown (ESD) systems and SCADA RTUs on offshore drilling platforms.
Chemical Processing
Maintains critical cooling, mixing, and pressure monitoring to prevent thermal runaway. Redundant supply for DCS (Distributed Control System) fieldbus modules in polymerization reactors.
Metal & Steel Processing
Protects heavy machinery and personnel by ensuring controlled shutdowns during main power loss. Safeguarding the continuous casting control panels and blast furnace cooling monitors.
When using the module, ensure that both input voltages are perfectly matched and never exceed the 40A maximum rated current. It is critical to accurately set the 20V–25V signaling threshold via the potentiometer and wire the integrated relay contact to your PLC for real-time fault alerts. Additionally, maintain proper ventilation and cooling within the cabinet to guarantee long-term stability in harsh industrial environments.
Alternative Names
6EP1961 3BA21
6EPI96I-3BA2I
6EP196I-3BA21
6EPI961-3BA21
Technical notes
The Siemens 6EP1961-3BA21 is a 24V DC / 40A redundancy module used to decouple two power supplies of up to 20A each. It features internal diode isolation, an IP20 rating, an integrated signaling contact, and a status LED, though official Ex explosion-proof approvals are no longer available.
FAQ View All FAQ
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What kind of product is the 6EP1961-3BA21?This is a 4-channel electronic selectivity and diagnostic module from the Siemens SITOP power supply series.
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How do you use the 6EP1961-3BA21?Users install it on a DIN rail, connect the 24V DC main power supply to the input terminal, and connect 4 independent load circuits to its outputs for overload protection.
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What is the primary technical function of the 6EP1961-3BA21?Its primary function is to monitor the branch currents of 4 separate 24V DC channels, precisely shutting down the faulty channel during an overload or short circuit to keep other healthy channels and the main power supply unaffected.
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What is the rated input and operating voltage of the 6EP1961-3BA21?The rated operating voltage of this module is 24V DC.
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What is the current adjustment range for each channel of the 6EP1961-3BA21?The rated output current of each channel can be individually adjusted between 3A and 10A via the potentiometers on the front panel.
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