7 Inspection and Maintenance
7 - 6
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
2 Remove the battery cover.
Refer to 5-3-10 Battery Installation on page 5-30 for how to remove it.
3 After removing an old battery, install a new battery.
4 Press in the battery harness and attach the battery cover.
• Before you replace the Battery, you must first supply power to the Controller for at least 5
minutes, and then you must complete this procedure within 5 minutes at 25°C after turning
OFF the power to the CPU Unit to ensure memory backup. If power is not supplied for at
least 5 minutes, the retained clock data may be lost.
• Never short-circuit the battery terminals; never charge the battery; never disassemble the
battery; and never heat or incinerate the battery. Doing any of these may cause the battery to
leak, heat, ignite, or rupture.
• Never use a battery that has been dropped on the floor or otherwise subject to shock. It may
leak.
Precautions for Correct Use
Turn ON the power after replacing the battery for a CPU Unit that has been unused for a long
time. Leaving the CPU Unit unused again without turning ON the power even once after the
Battery is replaced may result in a shorter Battery life.
The Low Battery Voltage event is cleared automatically the next time the Controller is turned
ON after replacing the Battery.
The service life of a battery is five years. Generally, the service life of a battery varies depending on the
ambient temperature and the power ON time rate. The NX1P2 CPU Units, due to low power
consumption, ensures a battery life of 60 months (five years), which is equivalent to the battery service
life.
Make a plan to replace the Battery so that the service life of the Battery will not exceed the minimum
lifetime under the normal product usage condition.
The Battery service life when power ON time rate is 0% (i.e., power OFF)
Battery Service Life and Replacement Period
Unit model number
Approx. minimum lifetime [month]
*1
*1. This is the life expectancy which Omron guarantees, based on the calculation
worst value of the part's specification of the product.
25°C 40°C 55°C
NX1P2- 60
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