Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 283)

Chapter
17
Publication 2755-833
Maintenance and
Troubleshooting
This chapter provides troubleshooting information to assist with
problem detection and resolution. It also shows how to replace the
I/O module protection fuses.
!
ATTENTION: Always use caution when replacing
fuses or installing accessories within the decoder.
The optional lithium backup battery (Catalog Number 1747–BA)
will last up to five years. If installed, replace the battery five years
from the date imprinted on the side of the battery cell. No other
battery–related maintenance or service is required.
The battery clip is used only to hold the battery in position. It is not
used to create an electrical circuit. Instead, the battery is equipped
with a female connector which attaches to the three–pronged male
connector below it on the main circuit board.
To remove the battery, squeeze the narrow edges of the connector,
and gently pull it away from the board. The connector is equipped
with a locking mechanism which releases when squeezed. Gently
remove the battery from the mounting clip.
!
ATTENTION: Be sure to follow all safety
precautions regarding the handling and disposal of
lithium batteries. Be sure to read and understand all
materials accompanying the battery before attempting
to install it.
To install a new battery, insert the battery in the retaining clip on the
main circuit board. Orientation of the battery in the clip makes no
difference, as the clip serves only to secure the battery in position.
Place the female connector attached to the battery on the
three–pronged plug on the main circuit board. The plug will fit in
only one direction. If you feel resistance, reverse the plug and try
again.
You will hear a click when the connector locking mechanism
engages.
Chapter Objectives
Replacing the Battery