Siemens SITOP DC UPS 6EP1931-2DC21

© 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 6EP1931-2DC21 Specifications

General

Brand	Siemens
Model	SITOP DC UPS 6EP1931-2DC21
Category	Control Unit
Language	English

Summary

Settings

2.1 Setting the Cut-in Threshold

Sets the voltage level for switching to buffer mode using DIP switches.

2.2 Setting the End-of-Charge Voltage

Configures battery charge termination voltage based on temperature and battery type.

2.3 Setting the Charging Current

Sets the constant charging current for different UPS models and battery types.

2.4 Setting the Buffering Time

2.5 Disconnection of the Output Voltage

Signaling

3.4 Alarm Messages

Red Alarm LED for lack of buffer readiness; blinking Alarm LED for battery change required.

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

Battery Modules

6.1 Battery Module Selection

Provides a table for selecting appropriate battery modules based on charging current and backup times.

6.2 Discharge Characteristics for Lead-Gel Battery Modules

Presents graphs showing battery voltage discharge curves at different current rates.

6.3 Instructions for the Characteristic FieldSelection of the Battery Capacity

Guides on using characteristic fields to determine required battery capacity for desired backup times.