Battery clock

The Historian module's real-time clock is maintained by the replaceable lithium battery.

The battery is non-rechargeable and field-replaceable. It powers the real-time clock for two years when the module is not powered on and for twelve years with power to the module on.

For information on replacing the battery, see the

FactoryTalk Historian Machine Edition Module Installation Instructions (Publication 1756-IN106)

.