Allen-Bradley 6177R-MM, User Manual

Page: 44 / 104

44 Rockwell Automation Publication 6177R-UM002E-EN-P - March 2017
Chapter 4 Replace Components
c. Press the module fully into the slot to engage the lock levers.
See Figure 11 on page 42 .
6. Reinstall the computer cover as detailed in Reinstall the Cover on
page 39 .
7. Follow the steps for Post-configuration on page 37 .
Replace the RTC Battery The computers use nonvolatile memory that
requires an RTC battery to retain system
information when power is disconnected.
The 3V, 600 mAh, CR2450 cell lithium
battery is on the motherboard.
The battery must be replaced during the
life of the computer. Battery life depends
on the amount of time the computer is on,
or
on-time.
Table 1 - Battery Estimated Life Span
If the computer does not retain the correct time and date, replace the battery.
Follow these steps to replace the RTC battery.
1. Follow the steps for Pre-configuration on page 36 .
2. Remove the computer cover as detailed in Remove the Cover on
page 38 .
3. For 750R computers, lay the computer on its side (components
showing).
On-time (hrs/wk) Estimated Battery Life Span (yrs)
0 4
40 5.5
80 7
ATTENTION: A risk of fire and chemical burn exists if the battery is not
handled properly.
• Do not disassemble, crush, puncture, or short external contacts.
• Do not expose the battery to temperatures higher than the
rated temperature ranges
of 0…50° C (32…113° F)
.
• Do not dispose of a used battery in water or fire.
For safety information on how to handle lithium batteries, see Guidelines for
Handling Lithium Batteries, publication
AG-5.4 .