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What does the “Battery” light on a Series One PLC indicate?

November 27th, 2018

For Series One and Series One Junior PLCs, the battery light on the CPU is turned off during normal operation. If this light is illuminated, the CPU battery should be replaced as soon as possible to ensure that the ladder-logic program contained in the unit’s RAM will not be lost in the event of a power outage. The replacement part number is IC610ACC150.

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