Siemens 6EP1931-2FC21

High-Performance Uninterruptible Power Supply for 24V Systems

The Siemens 6EP1931-2FC21 SITOP DC UPS module is a robust and reliable power backup solution engineered to ensure continuous 24V DC power delivery, even during power interruptions. With a 40A output current capacity, it is ideal for industrial automation systems, machinery control, and sensitive electronic operations that demand an uninterrupted power source. Operating within a 22 to 29 V DC input range and delivering a stable 24 V DC output, this unit safeguards your equipment against sudden shutdowns and data loss, preserving system integrity and minimizing operational disruptions.

Advanced Buffering Capabilities with Smart Voltage Management

This UPS module features an adjustable buffer response voltage, preset at 22.5 V but configurable between 22 and 25.5 V in 0.5 V increments, allowing users to fine-tune performance to their application needs. During power outages, the output remains at 24 V DC in buffering mode, with voltage ranging between 19 and 28.5 V depending on system conditions. The unit draws a typical current of 40 A and includes a small additional draw for battery maintenance, ensuring optimal battery readiness without compromising primary performance.

Efficient Power Use with Minimal Loss

Energy efficiency is a hallmark of the 6EP1931-2FC21, with a typical efficiency rating of 97.2% during normal operations and 96.9% when operating on battery backup. This high efficiency minimizes energy waste, reduces heat generation, and helps lower overall operating costs. Typical power losses are kept minimal at just 28.6 W under regular operation and 33.6 W during battery mode, making it both an environmentally and economically sound choice.

Intelligent Status Monitoring and Visual Indicators

Operators can easily assess operational states through a comprehensive LED indicator system. A green LED signals standard operation, while yellow and red LEDs indicate battery mode and alarms. These indicators are paired with floating changeover and NO contacts that provide remote signaling of conditions such as battery status, alarms, and voltage thresholds. This precise and real-time communication system enhances safety and reliability by informing users of system health.

Built to Last in Industrial Environments

The UPS module is designed to meet rigorous industrial standards. It stands up to demanding conditions with a protection class of IP20 and compliance with UL, CE, and marine certifications such as ABS and DNV. It supports DIN rail mounting and is compactly built with a width of 102 mm and a height of 125 mm, saving valuable cabinet space. The unit’s environmental resilience includes operation from -25°C to +60°C, and it’s classified for climate category 3K3 with up to 95% non-condensing humidity.

Frequently Asked Questions

What is the input voltage range for the Siemens 6EP1931-2FC21?

The input voltage range is 22 to 29 V DC, with a rated value of 24 V DC.

What is the maximum output current?

It can deliver up to 40 A of output current.

Does this UPS provide pure 24 V output during buffering mode?

Depending on conditions, it maintains 24 V in buffering mode, ranging between 19 and 28.5 V.

Can I adjust the voltage at which buffering begins?

It is adjustable from 22 to 25.5 V in 0.5 V steps.

What type of energy storage does it use?

It uses external rechargeable batteries for energy storage.

Is it compatible with DIN rail mounting?

Yes, it snaps onto a standard EN 60715 DIN rail.

What is the typical efficiency rating?

It offers 97.2% efficiency in normal operation and 96.9% on battery.

Does it include reverse polarity protection?

Yes, it has reverse polarity protection for both input and battery terminals.

Are there visual indicators for battery status?

There are LED indicators for normal operation, battery mode, alarm, and battery level above 85%.

What warranty is offered?

The unit has a 2-year warranty from MRO Electric and Supply and free shipping.

Contact Us Today For More Information About Siemens Products

Check out the rest of our Siemens product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at sales@mroelectric.com, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like 6EP1931-2FC21, take a look at more from our Power Supplies line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our 6EP1931-2FC21 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.