Siemens 6EP1931-2FC01 SITOP DC UPS Module 24 V DC, 40 A
Siemens 6EP1931-2FC01 SITOP DC UPS Module 24 V DC, 40 A
Part number 6EP1931-2FC01
Also written as 6EP19312FC01·6EP1 931-2FC01
1 left in stock
The Siemens 6EP1931-2FC01 is a SITOP DC-USV-Modul 40, a DC uninterruptible power supply module for 24 V DC systems. It sits between a 24 V DC supply and the load, and switches to a connected battery when the input voltage drops, keeping the 24 V output available. The rating plate gives a 23.5...26 V DC input at up to 40 A, a 24 V DC output at 37 A in mains operation, and up to 40 A in battery operation. Battery connection is via +Bat/-Bat terminals with a maximum 27.3 V charging output, typically 2 A. The module is part of the Siemens SITOP power supply range.
Specifications
| Manufacturer | Siemens |
| Product line | SITOP |
| Type designation | DC-USV-Modul 40 (DC USV Modul 40) |
| Order number | 6EP1931-2FC01 |
| Input voltage (L+/M) | 24 V DC (23.5...26 V DC) |
| Input current | max. 40 A |
| Output voltage (mains operation) | 24 V DC (23.5...26 V DC) |
| Output current (mains operation) | 37 A |
| Output (battery operation) | 24 V DC (27.3...18.5 V DC), 40 A |
| Battery terminals | +Bat / -Bat |
| Battery charging output | max. 27.3 V, typ. 2 A |
| Operating modes | Netzbetrieb (mains), Batteriebetrieb (battery) |
| Approvals/marks | TÜV Product Service (Bauart geprüft), CE |
| Origin | Made in Germany |
| Condition | Used |
| Warranty | 14-30 days depend on the parts |
Condition & testing
Used. Test status is not known. The unit shown in the photos is the unit supplied, with its rating plate legible. The "Siemens TESTED" mark on the plate is the factory mark and does not describe this unit's present condition.
Compatibility
Siemens SITOP DC-USV-Modul 40, for 24 V DC supplies with a connected battery, per the rating plate data.
What's included
Unit only
Before you order
- Confirm your 24 V DC supply stays within the 23.5...26 V DC input range and that the load stays within 37 A in mains operation.
- A suitable battery or battery module must be connected to +Bat/-Bat; none is included.
- Unit only: no mounting accessories, connectors or documentation are included.
Compatible & Related

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Are the parts on your website tested and genuine?
Yes. Every part sold by Samonde is professionally tested by our technicians in Tallinn before shipping. We source directly from decommissioned industrial equipment, authorized distributors, and certified surplus stock. Each item comes with a functionality warranty.
Do you offer warranties on industrial spare parts?
Absolutely. All parts come with a minimum 14-30 day warranty. Many items, especially Siemens and Heidenhain components may have include extended 90-day coverage (depends on the parts). If a part fails during the warranty period, we offer replacement or full refund.
Can you source a part that is out of stock?
Yes. If you need a specific Siemens, Heidenhain, Fanuc, or other industrial part that is currently out of stock, contact us with the part number. Our sourcing team across Europe can usually locate hard-to-find automation components within 5-10 business days.
How do I know I'm ordering the correct part for my machine?
Each product listing includes the exact manufacturer part number (MPN), compatibility notes, and photos of the actual item. If you are unsure, send us your machine model and part number via the Contact page or WhatsApp, and our engineers will verify compatibility before you purchase.
Do you ship internationally outside the EU?
Yes. Samonde ships worldwide from our EU warehouse. We offer UPS and DHL Express and standard freight options to North America, Asia, Middle East, and South America. All shipments include tracking and customs documentation.
Siemens 6EP1931-2FC01 SITOP DC UPS Module 24 V DC, 40 A