Automation Direct Do-more H2 PLC Series, Руководство пользователя по оборудованию

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Do-more H2 Series PLC Hardware User Manual, 1st Edition, Rev. F - H2-DM-M
3–12
Chapter 3: Specifications - CPU Modules
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D
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.
When the controller detects that the battery voltage is too low, and needs to be replaced, the
PWR LED will be YELLOW instead of it’s normal GREEN color. 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 base.
• Remove the battery from it’s holder that is located on the back of the controller’s PWB,
in the lower right 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, which should be more than enough to
replace the battery.
• Insert the new battery into the holder, making sure the alignment is correct.
• Reinstall the controller in the base.
• Power up the system containing the controller.
• Verify that the PWR LED is now GREEN instead of YELLOW and the system-defined
location $BatteryLow will be OFF.
H2-DM1 and H2-DM1E
Battery Replacement
Part # D0-MC-BAT.