Siemens SITOP DC UPS 6EP1931-2FC42

© Siemens AG, 2009 1/18
Considerations for Use
of the SITOP DC UPS Module
6A without interface (6EP1931-2DC21)
6A with serial interface (6EP1931-2DC31)
6A with USB interface (6EP1931-2DC42)
15A without interface (6EP1931-2EC21)
15A with serial interface (6EP1931-2EC31)
15A with USB interface (6EP1931-2EC42)
40A without interface (6EP1931-2FC21)
40A with USB interface (6EP1931-2FC42)
500S (15A / 2.5kWs capacitor) (6EP1933-2EC41)
500S (15A / 5kWs capacitor) (6EP1933-2EC51)
500P (15A / 5kWs capacitor) (6EP1933-2NC01)
500P (15A / 10kWs capacitor) (6EP1933-2NC11)
Release 2

Siemens SITOP DC UPS 6EP1931-2FC42 Specifications

General

Input Voltage	24 V DC
Output Voltage	24 V DC
Output Current	10 A
Power	240 W
Protection Class	IP20
Mounting	DIN rail mounting
Efficiency	≥ 90 %
Battery Type	Lead-acid battery
Backup Time	Depends on battery capacity
Communication	Optional
Weight	1.5 kg

Summary

1. Principle Functions

2. Settings

2.1 Setting the Cut-in Threshold

Configures the input voltage level at which the UPS module switches to battery buffer mode.

2.2 Setting the End-of-Charge Voltage

Defines the target voltage for charging the connected battery module, dependent on type and temperature.

2.3 Setting the Charging Current

Specifies the constant current used for charging the battery module until the end-of-charge voltage is reached.

2.4 Setting the Buffering Time

Determines the duration the UPS module provides backup power from the battery.

4. Communication with the PC

5. Operating Modes

5.1 Long Power Failure in Devices without an Interface

5.2 Brief Power Failure in Devices without an Interface

5.3 Long Power Failure in Devices with an Interface

5.4 Brief Power Failure in Devices with an Interface

6. Battery Modules

6.1 Battery Module Selection

Provides a table to select appropriate battery modules based on charging current and backup time requirements.

6.3 Instructions for the Characteristic FieldSelection of the Battery Capacity

Guides on how to use discharge characteristics to determine the required battery capacity for specific backup times.