Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 143)

Section 4A
Primary 9/260 and 9/290 Components
4A-9
The memory for data such as part programs, tool offset/compensation data,
interference zones, and work coordinate offset data is stored in on the CPU
board. In the case of a power failure, there is a super capacitor on the
CPU board that backs up this data for up to 5 days (at 40°C) on systems
without extended program storage. This super capacitor recharges within 1
hour of power turn on if completely discharged. If you want to extend this
backup time, or if you have extended program storage (2 Megabytes) you
install a lithium battery pack (8520-LIBAT) that supports the data for:
9/260 and 9/290 Control and Description: Time (at 40°C Discharge)
standard 3 years
with extended program storage 1 years
This battery pack is connected to the lithium battery connector (P1) on the
motherboard as shown in Figure 4A.9. Batteries and the battery cable are
included with the battery replacement kit.
Figure 4A.9
Lithium Battery Connector (P1)
Pin Number Polarity
1
2 --
+
Enclosure
Motherboard
Cable
Lithium Battery Pack Power Supply
1
2
The lithium battery contains heavy metals and
must be collected separately from other waste.
4A.5
Battery Backup for the 9/260
and 9/290