Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 273)

Section 5A
9/440 Resolver--based CNC/Drive System
5A-27
Connector Description Signal Destination
Analog Out ± 10V Analog with no feedback (typically spindle drive)
RET Signal Return (typically spindle drive)
SHLD shield connect at wiring board only
The memory for part programs, tool offset/compensation data, work
coordinate offset data, etc... is stored on the processor board. In the case
of a power failure, there is a super capacitor on the processor board that
backs up this data for up to 5 days (at 40
° C) on systems without extended
program storage. This super capacitor re-charges within 1 hour of power
turn on if completely discharged. If you want to extend this backup time
install the lithium battery pack that supports the data for:
9/440 Resolver- based Memory Option: Time (at 40°C Discharge):
standard 3 years
with extended program storage 1 year
This battery pack is connected to the lithium battery connector (P1) on the
wiring board as shown in Figure 5A.13. Batteries and the battery cable are
included with the battery replacement kit.
Figure 5A.13
Lithium Battery
9/440 Resolver--based
System Module
Press cover release to open
Wiring Board
+
--
P1
Mount the battery pack to the
inside of the module cover.
Connect the battery pack
to P1 on the wiring board.
The lithium battery contains heavy
metals and must be collected
separately from other waste.
5A.4.4
Battery Backup