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Guide: Adding Extra Run-Time to Your UPS - The Operation
Written by Gizmo   
Monday, 30 January 2006 00:00
Article Index
Guide: Adding Extra Run-Time to Your UPS
The Operation
The Operation - Removing the Face-Plate
The Operation - Removing the Battery
The Operation - Opening It Up
The Operation - Exposed Wiring
The Operation - Changing Connectors
The Operation - Splicing
First Smoke Test
Build the Battery Pack
Build the Battery Pack - The Wiring Harness
Second Smoke Test
Reassembly and Final Configuration
Reassembly and Final Configuration - Calibration
Reassembly and Final Configuration - All Done
All Pages

The Operation

The first thing we have to do is disconnect power, any plugged in equipment, and remove the battery. The first two items are relatively straight-forward; just pull all the power plugs out of their sockets. However, disconnecting the battery is a bit more involved.

All Smart-Ups units, and most Back-Ups units that I am familiar with from APC ship with a battery connector on the back of the unit. According to APC, this connector is provided to allow the disconnection of the battery for shipping purposes. While this is true of units that do not support APC's extended run-time options, the actual fact is that the connector exists to allow external battery packs to be plugged in. Since many units share the same basic chassis and internal electronics, it makes things easier and more cost-effective for APC if they can use common components and simply change some internal wiring. We will be exploiting this fact for this modification.

Here you can see the battery disconnect on the back of the unit. These are called 'Anderson' connectors, and are interesting in their design because of the fact that they are universal connectors. There is no 'male' or 'female' connector as is normally the case; all you need is two connectors of the same color and you are ready to rock-n-roll. The ends of the connectors are keyed so that it is not possible to mate two connectors of different colors, thus making it possible to quickly identify connectors that can mate together.


You can also note that this chassis is used for the both the 1000VA and 1400VA models. The black bracket is a retaining bracket that is screwed down to prevent the connector from accidentally coming loose.

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