GE Series 90-30 PLC

6-10 Series 90-30 PLC Installation and Hardware Manual – August 2002 GFK-0356Q
6
POWER
SUPPLY
CONNECTOR
BATTERY
PLUG
Figure 6-2. Installing the Battery Accessory Kit
Battery Accessory Kit Installation
1. Insert the plug on the end of the battery cable into the 2-pin connector on the Battery Accessory
board. The battery plug is normally not plugged into the accessory connector. This prevents
accidental discharge of the battery during storage and handling.
2. Align the backplane connector on the Battery Accessory board with the power supply
connector on the baseplate backplane. Push the Battery Accessory board toward the baseplate
until it is fully seated. See the figure above.
3. If the baseplate is to be shipped with the Battery Accessory board installed, ensure that the
board is held in place by packing material or cable ties. The cable ties can be installed in holes
provided on both ends of the accessory board and secured to the baseplate.
Caution
To avoid losing CPU data, the Battery Accessory must be installed within 1
hour after turning off PLC power, or 20 minutes after removing the memory
backup battery. See “Super Capacitor Memory Backup” for details.
When the Battery Accessory is removed, a power supply module with a good
battery must be installed and/or input power applied within 20 minutes to
avoid losing CPU data. See “Super Capacitor Memory Backup” for details.
External Battery Module (IC693ACC302)
This module provides long-term battery backup for all modular Series 90-30 CPUs. Its two-foot
cable plugs into the power supply battery connector. The External Battery Module maintains RAM
contents on a CPU374 for 15 months. CPU models 331—364 maintain RAM contents for
approximately 75 months. For details, see the Datasheet for the External Battery Module,
GFK-2124.