Siemens 6EP1931-2DC21 SITOP DC UPS Module 24VDC 6A Power Supply – USED

$264.99

This item is pre-owned and may exhibit signs of cosmetic wear, including scratches or scuffs; however, it is fully functional and operates as intended. Please note, it may not include all components originally provided by the manufacturer. The images displayed show everything included with this purchase.
SKU: 858003
In stock (1 available)
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    30-Day Returns

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    90-Day Warranty

Manufacturer:

Model Number: DC UPS Module

Series: SITOP DC UPS

MPN: 6EP1931-2DC21

Listed Item Condition: Used

Product Details:

Summary

Siemens 6EP1931-2DC21 SITOP DC UPS module designed to provide 24VDC uninterruptible power for industrial control and automation systems. Rated for 24VDC input and 24VDC/6A output and designed for operation with an external battery module. This was part of a custom electrical/electronics cabinet that was mounted on a yacht. As the cabinet was customized for the exact application on this vessel, we have disassembled/parted the cabinet out. All parts were reported to be working, but we lack the proper equipment to test them and confirm this. As such, we are selling them as working with a 30 day period for customers to test and ensure functionality and a 90 day warranty for peace of mind.

Includes only Module, No instructions, Installation screws, or Box. In Great Condition.

Product Description

The Siemens 6EP1931-2DC21 is a SITOP DC UPS module designed for reliable 24VDC backup power in industrial control applications. The module provides up to 6A output and automatically supports connected loads from an external battery during interruptions to the DC supply.

Product Information:

- Manufacturer - Siemens
- Model Number - 6EP1931-2DC21
- Series - SITOP DC UPS
- MPN - 6EP1931-2DC21
- Product Type - DC UPS Module
- Power Supply Type - Uninterruptible DC Power Supply
- Interface - Without Interface
- Rated Input Voltage - 24VDC
- Input Voltage Range - 22–29VDC
- Rated Input Current - 6A + Approx. 0.6A with Empty Battery
- Rated Output Voltage - 24VDC
- Output Voltage in Buffering Mode - 19–28.5VDC
- Rated Output Current - 6A
- Peak Output Current - 6.3A
- Output Current in Normal Operation - 0–6A
- Output Current in Buffering Mode - 0–6A
- Charging Current - 0.2A / 0.4A
- Energy Storage Type - External Battery
- Short-Circuit Protection - Yes
- Efficiency at Rated Output - 95%
- Efficiency During Battery Operation - 94.5%
- Typical Power Loss at Rated Output - 7W
- Typical Power Loss During Battery Operation - 8W
- Typical Active Output Power - 144W
- Typical Startup Delay - 1 Second
- Typical Output Voltage Rise Time - 60ms
- Electrical Connection - Screw-Type Terminals
- Net Weight - 0.4 kg / 0.882 lb
- Package Dimensions - 14 x 14 x 6 cm
- EAN - 4025515151012
- UPC - 662643298291
- Commodity Code - 85044060
- Country of Origin - Romania
- Product Status - Phase-Out

What's Included:

  • Siemens 6EP1931-2DC21 SITOP DC UPS module

Compatible Parts:

Return Info: 30-Day Returns

Warranty Info: 90-Day Warranty

Dimensions: 5 × 3 × 6 in, Weight: 0.15 lbs

Shipping Info: Free shipping applies to items being delivered within the contiguous United States (lower 48). HI, AK, PR, and all other US Territories, and International locations will have shipping calculated during checkout. Please be advised if the item is large or is a multi-piece shipment, shipping quotes may be inaccurate due to restrictions outside of our control, in those instances you will be contacted promptly.

Terms:

All items sold at Max Marine Electronics come as you see in the pictures provided, with only the parts and accessories stated in the description section named “What’s Included”. IF YOU DO NOT SEE SOMETHING YOU EXPECT TO BE INCLUDED IN THE DESCRIPTION WE PROVIDE, IT WILL NOT BE INCLUDED. Read all descriptions thoroughly. There are times when a display is used only to show the item being sold is functional and working properly. In this case, these displays are not included. If you have any questions feel free to reach out to Max Marine Electronics. We always want to be transparent with our customers and fully disclose any information regarding the products we sell.

***PLEASE NOTE***Buyers outside the contiguous United States:
We strive to provide accurate shipping quotes at checkout. However, for satellites, radars, large items, or multi-piece shipments, system and carrier limitations may sometimes result in incorrect estimates. If this happens with your order, our team will reach out to you right away to ensure you receive the best possible shipping solution. Your satisfaction is our priority!

Categories Power Management » Voltage and Phase Converters
QTY Available 1
Date Added Oct 5, 2026

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