Siemens SITOP DC UPS 6EP1931-2DC31 User Manual

© 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 6EP1931-2DC31 Specifications

General

Brand	Siemens
Model	SITOP DC UPS 6EP1931-2DC31
Category	Control Unit
Language	English

Summary

SITOP DC UPS Module Principle Functions

Normal Mode Operation

Buffer Mode Operation

Configuring SITOP DC UPS Module Settings

Setting the Cut-in Threshold Voltage

Explains how to set the input voltage level for switching to buffer mode.

Setting the End-of-Charge Voltage

Details setting the battery charge termination voltage based on temperature.

Setting the Battery Charging Current

Describes setting the constant current for charging the battery module.

Configuring the Buffering Time

How to configure the duration the UPS provides backup power from the battery.

SITOP DC UPS Module Signaling and Status

Troubleshooting with Alarm Messages

Explains the red LED and relay contact indicating issues with battery readiness.

Lack of Buffer Readiness Alerts

Explains the red LED and relay contact indicating issues with battery readiness.

Battery Replacement Required Alerts

Describes conditions for the "Alarm" signal indicating a defective battery needing replacement.

SITOP DC UPS Operating Modes

Long Power Failure (No Interface)

Brief Power Failure (No Interface)

Long Power Failure (With Interface)

Brief Power Failure (With Interface)

SITOP DC UPS Battery Module Selection

Selecting the Correct Battery Module

Table and guidance for selecting the appropriate battery module based on current.

Lead-Gel Battery Discharge Characteristics

Calculating Required Battery Capacity