Chapter 6 Memory Backup/Battery Backup; Backup Battery For Ram Memory (All Supplies) - GE 90-30 PLC Series Installation And Hardware Manual

Memory Backup/Battery Backup
Chapter
6

Backup Battery for RAM Memory (All Supplies)

The long-life Lithium battery (IC693ACC301) used to maintain the contents of the CMOS RAM
memory in the CPU is accessed by removing the cover plate located at the bottom of the power
supply faceplate. This battery is mounted on a plastic clip attached to the inside of this cover.
The battery is wired to a small Berg female connector that connects to either of the two Berg male
connectors mounted on the Power Supply printed circuit board. This battery can be replaced with
power applied to the PLC.
Figure 6-1. Backup Battery for RAM Memory
GFK-0356Q
PWR
OK
Low Battery
RUN
Warning LED
BATT
B
A
T
T
E
R
Y
Battery Cover Removal Notch
If a Low Battery Warning (BATT LED turns ON) occurs, replace the
battery located in the power supply before removing power from the rack.
Otherwise, there is a possibility that data will be corrupted or the
application program will be cleared from memory.
BATTERY
CONNECTORS
LITHIUM
BACK-UP
BATTERY
Caution
Battery
Cavity
6-1