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DC Backup UPS

Application, Maintenance and Installation Manual

Revision 1

Manual Contents

1 Introduction....................................................................................................................................... 2
2 Product range.....................................................................................................................................2
3 Application........................................................................................................................................ 3

3.1 Sizing of UPS............................................................................................................................. 3

4 Technical description.........................................................................................................................4
5 Monitoring.........................................................................................................................................5
6 Installation......................................................................................................................................... 6
7 Maintenance...................................................................................................................................... 6
8 Specification...................................................................................................................................... 7

1

Introduction

The Amalgen 7021 and 7025 series DC backup unit is an un-interruptable power supply, designed for 
situations where only 12VDC is required. The 7021 and 7025 series is efficient and simple, allowing the 
equipment to be protected in a cost-effective way, and with high reliability.  They provide the following 
functions:

Supply when AC mains is available

Supply when AC mains has failed

No-break changeover of power when mains fails or returns

Recharge of battery when AC returns (Amalgen battery management system)

The above functions are provided in a single unit designed to fit in 19 inch equipment racks.  Importantly, 
the unit forms a complete solution to the power and backup power needs. Therefore, there are advantages to 
the installer and user. These are:

No need to do separately mount batteries

No need to for external components to compensate temperature for battery charging

No need to for any external components

No need for any wiring other than load connection

2

Product range

The 7021 and 7025 series comprises 2 units.  The main features are shown in the table below.

Model 
number

Backup 
capacity 

Features

Load current
Norm (surge 20ms)

Operating 
range

7021

17AH

7025

40AH

Analog control, full featured, basic telemetry

1A (5A)

0C-55C

2A (10A)

0C-55C

 
The base model offers reliable power with all product features. 

18/10/06

7021 and 7025_manual1.doc

Page 2 of 7

Summary of Contents for 7021 Series

Page 1: ...algen Model 7021 7025 DC Backup UPS Manual Revision 1 Model 7021 and 7025 Series Amalgen Technologies Pty Ltd 43 Anderson road Mortdale NSW 2223 Australia 18 10 06 7021 and 7025_manual1 doc Page 1 of...

Page 2: ...e of battery when AC returns Amalgen battery management system The above functions are provided in a single unit designed to fit in 19 inch equipment racks Importantly the unit forms a complete soluti...

Page 3: ...rly in the small price sensitive categories is not straightforward Then there are power spikes and load transients to consider A DC back up system is a good alternative The 7021 and 7025 back up syste...

Page 4: ...h battery backup An AC rectifier supplies power to the load and doubles as a battery charger There are 3 modes of operation AC power available In this mode the load is supplied from the AC rectifier T...

Page 5: ...motely via voltage free contacts The following table shows the details CONDITION LOCAL LEDs REMOTE RELAYs Charger OK Green light if OK N O contact closes if OK DC available Green light if Vload over 1...

Page 6: ...the batteries as follows 1 connect RED wire to ve terminal of battery 1 2 connect BLACK wire to ve terminal of battery 2 3 Fit fuse Replacement of batteries follows the same procedure Remote monitori...

Page 7: ...Fusing To be provided external to unit IP rating IP20 DC Voltage 12VDC Nominal 9V to 14 Output is floating from earth Current The current ratings of different models given below Charger Type Constant...

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