User`s guide

Page 10

Controlinc 1746-C (Version 5.21) Network Master Users Guide (2004-11-18)

2.2.2. Red “BA LOW” LED Usage

The red “BA LOW” LED indicates low battery status. The purpose of the battery in the BASIC module

is to back up portions of RAM and other resources. For guaranteed long-term repeatability of

operations, the EIM 1746-C program does not utilize any of these resources. Therefore, it doesn’t

matter what state the battery is in (installed and fully charged, inline and dead or totally removed from

the unit), the EIM network master program will always run the same.

This also means that a new 1746-C module might run with the BA LOW LED off for a while and then

turn on when the battery dies. This is normal and has NO effect on the system. However, if for

some reason you want to replace the battery, you can order it directly from Allen-Bradley.

“BA LOW”

LED