Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 158)

Section 4B
Connecting the 3-axis Servo Module
4B-12
CN10 Absolute Encoder Battery Connector
The digital servo module receives battery power from the battery pack
through connector CN10. This battery power supplies battery backup to
the absolute encoder position register. You can connect up to four lithium
battery backs to one enclosure: one to support the SuperCap memory
backup and three others to support a maximum of three digital servo
modules. Figure 4B.10 shows the lithium battery packs installed in the
component enclosure. Figure 4B.11 shows the connector on the module
and lists the pin assignments.
Figure 4B.10
Lithium Battery Packs Installed in the Component Enclosure
Lithium Battery Packs
Connections to digital servo modules
with absolute encoders
ATTENTION: Reversing the polarity of the absolute encoder
battery power supply can destroy some elements of the absolute
encoder.