7-2
Replacing the Battery
The separately-sold Battery for clock is one of the NX-series components that require periodic re-
placement as preventive maintenance. This section describes how to replace the Battery.
Replacement Battery
Use the Battery CJ1W-BAT01 for replacement.
Precautions for Correct Use
Be sure to mount a Battery within two years of the production date shown on the Battery label.
CJ1W-BAT01
18-03
Manufactured in March
2018.
Production Date
Replacement Procedure
Use the following procedure to replace the battery.
Precautions for Safe Use
We recommend mounting or replacing the Battery with the power OFF to prevent the CPU Unit's
sensitive internal components from being damaged by static electricity
. The Battery can be mount-
ed or replaced without turning OFF the power supply
. To do so, always touch a grounded piece of
metal to discharge static electricity from your body before starting the procedure.
If the Low Battery Voltage error occurs after you mount the Battery, connect the Sysmac Studio
and clear the error.
Additional Information
UL standards require that batteries be replaced by experienced technicians. Always place an ex-
perienced technician in charge of battery replacement.
1 Turn OFF the power supply to the Controller.
If the CPU Unit has not been ON, turn it ON for at least five minutes and then turn it OFF.
Additional Information
The CPU Unit has a built-in capacitor that retains the clock data during battery replace-
ment or power interruptions.
If power is not turned ON for at least five minutes before replacing the battery, the built-
in capacitor cannot be fully charged and the clock data may be lost during battery re-
placement.
2 Remove the battery cover.
Refer to 5-3-10 Battery Installation on page 5-34 for how to remove it.
7 Inspection and Maintenance
7-6
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
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