6EP1961-3BA21 Siemens SITOP PSE202U Redundancy Module 24V 40A

Technical Specifications & Electrical Data

The 6EP1961-3BA21 operates with a DC input voltage range of 24 to 28.8 V. Its output voltage follows the input voltage minus approximately 0.5 V, delivering a nominal 24 V DC.

• Brand & Manufacturer: Siemens (SITOP PSE202U series).
• Product Model: 6EP1961-3BA21 (Redundancy module).
• Input Voltage: 24 ... 24 V DC (nominal), 24 ... 28.8 V DC (range).
• Output Voltage: Nominal 24 V DC, regulated and isolated.
• Output Current: Rated at 40 A total (max. 20 A per input).

Efficiency & Power Loss

This redundancy module offers high efficiency to minimise energy waste in your cabinet. It maintains low power consumption even under no-load conditions.

• Efficiency: 96.6 % at rated output.
• Power Loss (Rated Load): Typically 34 W .
• Power Loss (No-Load): Maximum 1.5 W .

Status Indication & Signalling

The module provides clear visual and electrical status signals for easy diagnostics. A green LED confirms both input voltages are above the set threshold.

• Green LED: Illuminates when both input voltages exceed the switching threshold (adjustable 20 ... 25 V).
• Red LED: Indicates at least one input voltage has fallen below the threshold.
• Relay Contact: Provides isolated changeover contacts (8 A/240 V AC, 24 V DC) signalling "OK" status.

Mechanical Dimensions & Mounting

The compact housing of the 6EP1961-3BA21 allows for space-saving DIN rail installation. It requires specific clearance around the unit for proper airflow and cooling.

• Dimensions (W x H x D): 70 mm x 125 mm x 120 mm .
• Installation Height: 225 mm total with DIN rail.
• Required Clearance (Top/Bottom): 50 mm each.
• Mounting Method: Snaps onto 35 x 7.5/15 mm DIN rail (EN 60715).
• Net Weight: 0.5 kg .

Ambient Conditions & Approvals

This SITOP module is designed for harsh industrial environments and carries multiple international certifications. It operates reliably across a wide temperature range.

• Operating Temperature: -25 ... +60 °C (natural convection).
• Storage/Transport Temperature: -40 ... +85 °C .
• Humidity: 5 ... 95 % non-condensing (climate class 3K3).
• Protection Class: IP20 .
• Safety Standards: CE, cULus-Listed (UL 508, CSA C22.2 No. 107.1), EAC, and marine approvals (ABS, DNV).
• MTBF at 40 °C: 6,471,654 hours (high reliability).

Electrical Connection Details

The module uses screw terminals for secure and reliable wiring. It provides separate terminals for input, output, and the signalling relay.

• Input/Output Terminals: Each accepts 0.33 ... 10 mm² (single-core/finely stranded).
• Relay Contact Terminals: Accept 0.5 ... 2.5 mm² (single-core/finely stranded).
• Wiring Note: Use appropriate wire gauges for the 40 A total current.

Package Contents & Logistics

Your order includes the redundancy module and necessary documentation. We ensure fast and secure delivery through our trusted logistics partners.

• Package Includes: One SITOP PSE202U redundancy module 6EP1961-3BA21.
• Condition: Brand new and original Siemens product.
• Shipping Partners: FedEx, UPS, and DHL.
• Dispatch Time: We ship within 5 business days.
• Return Policy: We support returns within 30 days.

Frequently Asked Questions (FAQ)

• What happens if one of the two input power supplies fails?
  The module automatically decouples the failed supply and continues to deliver the full 40 A output from the remaining unit, ensuring uninterrupted operation of your load.
• Can I adjust the output voltage of this redundancy module?
  No, the output voltage is fixed and follows the input voltage minus approximately 0.5 V. It is not user-adjustable.
• Is this module suitable for use in marine environments?
  Yes, it holds approvals from the American Bureau of Shipping (ABS) and Det Norske Veritas (DNV), making it suitable for shipbuilding applications.
• What is the maximum total output current I can draw from this module?
  The maximum aggregate current is 40 A. Above +60 °C up to +70 °C, you need to derate the output by 3% per Kelvin.

Contact Information Inquiries: sales@nex-auto.com, +86 153 9242 9628

Partner NexAuto Technology Limited : https://www.nex-auto.com/