Do-more T1H Series PLC Hardware User Manual, 1st Edition, Rev. C
3–12
Chapter 3: Specifications - CPU Modules
Battery Replacement
All Do-more controllers have an onboard battery that maintains the contents of the retentive
memory any time the power to the controller is lost. The battery has an expected lifespan
of three years; after which the battery will need to be replaced. The battery is a standard
CR2032, coin cell battery. AutomationDirect part number: D0-MC-BAT.
When the controller detects that the battery voltage is too low, and needs to be replaced, the
ERR LED will be YELLOW. When Do-more Designer is online with the controller, the
system-defined location $BatteryLow will be ON as well.
NOTE:
Make sure to have a current copy of the Do-more Designer project saved to Disk before performing
this operation.
• Power down the system containing the controller.
• Remove the controller from the system.
• Pry open the front cover and remove the battery from it’s holder that is located in the
lower left corner. The battery is removed by pushing on the back of the battery to begin
sliding it out of the holder, then pulling it the rest of the way out by the front edge of
the battery. Make note of how the battery is aligned in the holder.
NOTE:
The controller has an onboard capacitor that will maintain the retentive memory contents while the
battery is being replaced. This capacitor has a two-hour runtime (minimum), which should be more than
enough to replace the battery.
• Insert the new battery into the holder, making sure the alignment is correct, and close
the cover.
• Reinstall the controller in the system.
• Power up the system containing the controller.
• Verify that the ERR LED is not YELLOW and the system-defined location
$BatteryLow will be OFF.
ON
T1H-DM1 and T1H-DM1E
Battery Replacement
Part # D0-MC-BAT
