The Siemens 6EP1931-2FC21 is a SITOP DC UPS module designed to provide a reliable 24 V DC/40 A output during power failures. This module is engineered for integration with SITOP power supplies and external battery modules to ensure continuous operation of critical industrial processes. This specific model is a basic version without integrated communication interfaces, focusing on robust power buffering and operational readiness.
Features
24 V DC / 40 A output capacity
Input voltage range: 22 V to 29 V DC
Standard DIN rail mounting (EN 60715)
High reliability with monitoring of operational readiness
Designed for bridging power failures in industrial control systems
Compact design for control cabinet installation
Applications
Bottling and Packaging Plants: Maintains conveyor and filling control during power dips to prevent waste and mechanical jams.
Cranes and Hoists: Keeps safety control systems active during power loss for safe load positioning.
Industrial PCs (IPCs): Provides backup power to prevent data corruption and improper shutdowns.
Chemical and Water Treatment Plants: Ensures constant power for monitoring critical pressure, temperature, and chemical levels.
Wind Power Turbines: Powers obstruction lighting and diagnostic sensors during grid failures.
Technical Specifications
Product Model
6EP1931-2FC21
Manufacturer
Siemens
Input Voltage
24 V DC (Range: 22 - 29 V)
Output Current
40 A
Peak Current
42 A
Buffering Mode Output
19 - 28.5 V DC
Active Power (Typical)
960 W
Charging Current
1 A, 2 A
Voltage Increase Time
360 ms
Mounting
DIN Rail
Installation Guidelines
Mount the device vertically on a 35mm DIN rail (EN 60715 35x15/7.5) inside a control cabinet.
Maintain a minimum clearance of 50 mm above and below the unit to facilitate natural convection cooling.
Use a cable cross-section of at least 10 mm² for the 24 V DC input (L+) to safely handle the 40 A load.
Ensure correct polarity when connecting the external battery module to prevent damage to the internal fuse.
Always power down the system before performing wiring or maintenance on the module.
FAQs
What is the 6EP1931-2FC21?
The Siemens SITOP 6EP1931-2FC21 is a 24 V DC/40 A uninterruptible power supply (UPS) module designed for bridging power failures. It is a basic model without communication interfaces for PC monitoring.
What is the input/output voltage?
The module operates with a 24 V DC nominal input and provides a 24 V DC output, with a buffering mode output range of 19 to 28.5 V DC.
Does this unit have communication interfaces?
No, this specific model (6EP1931-2FC21) does not include USB or other communication interfaces.
