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7-6SectionBattery Replacement

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The standard period for maintenance checks is 6 months to 1 year, but more fre-
quent checks are required if the PC is operated in more demanding conditions.
If the criteria are not met, adjust to within the specified ranges.
Inspection items Details Criteria Remarks
Power supply Determine whether the voltage fluctuation
at the power supply terminals is within
specifications.
Within the voltage variation
range (20.4 to 26.4 VDC) Tester
Environmental
conditions Is the ambient temperature inside the
panel appropriate? 0 to 55_CThermometer
Is the ambient humidity inside the panel
appropriate? 35% to 85% RH with no
condensation Hygrometer
Has dirt or dust collected? None Visual inspection
I/O power supply Is the voltage fluctuation measured at the
I/O terminals within the standard range? Each I/O terminal must
conform to the specifications Tester
Installation status Are all Boards securely installed? Nothing is loose Phillips screwdriver
Are all connection cables and connectors
inserted completely and locked? Nothing is loose Visual inspection
Are any of the external wiring screws
loose? Nothing is loose Phillips screwdriver
Are any of the external wiring cables
frayed? No external abnormalities Visual inspection
Product service life Contact output relay Electrical:
Resistance load:
300,000 operations
Inductive load:
100,000 operations
Mechanical:
10,000,000 operations
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Battery (C500-BAT08) 5 years ---
Standard Tools (Required)
•Screwdrivers (Phillips and flat-blade)
•Voltage tester or digital voltage meter
•Industrial alcohol and a cotton cloth
Measurement Devices (May be Needed)
•Synchroscope
•Cathode-ray oscilloscope
•Thermometer, hygrometer
Note Do not attempt to disassemble, repair, or modify the PC in any way.
7-6 Battery Replacement
WARNING Do not drop, disassemble, crush, short-circuit, recharge, or dispose of the
battery in fire. The battery may explode, burn, or leak and cause personal injury.
Turn ON the power supply for at least 5 minutes before replacing the battery in
order to recharge the backup capacitor.
Turn OFF the power supply to the CPU Board before replacing the battery.
Use the procedure below when replacing the battery. This procedure must be
completed within 5 minutes to prevent loss of memory contents.
Dispose of the old battery properly.
CPU Boards that are equipped with a clock are also equipped with a backup bat-
tery that has a 5-year lifetime at 25_C. Use the following procedure when replac-
ing the backup battery.
1, 2, 3... 1.Stop CPM2B operation and turn OFF the CPM2B’s power supply.
Required Tools
Precautions
Replacement Procedure