Appendix 4.2 Battery Lives Of Cpu Modules - Mitsubishi Electric Q26UD(E)HCPU User Manual

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Appendix 4.2

(1) Battery (Q6BAT) lives of Basic model QCPUs

The power-on time ratio indicates the ratio of programmable controller power-on time to one day (24 hours).

(When the total power-on time is 12 hours and the total power-off time is 12 hours, the power-on time ratio is 50%.)

The guaranteed value represents a battery life at 70°C, which is calculated based on the characteristic values of

manufacturer-supplied memory (SRAM) and on the assumption of storage within the ambient temperature range of

-25 to 75°C (operating ambient temperature of 0 to 55°C ).

The actual service value (reference value) represents a battery life that is calculated based on the values measured at

storage ambient temperature of 40°C. This value is intended for reference only, as it varies with characteristics of the

In the following status, the backup time after power off is 3 minutes.

• The battery connector is disconnected.

• The lead wire of the battery is broken.

Battery lives of CPU modules

Power-on time

26,000 hours

37,142 hours

43,800 hours

26,000 hours

37,142 hours

43,800 hours

11,200 hours

18,666 hours

43,800 hours

Battery life

Actual service value

(Reference value)

43,800 hours

43,800 hours

25,175 hours

35,964 hours

43,800 hours

After SM52 turned on

(Backup power time

after an alarm

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