10 MAINTENANCE AND INSPECTION

MELSEC-Q

(b) CPU module whose serial number's first 5 digits are "04011" or earlier

 

Energization

 

Battery life

 

 

 

 

After SM51 is energized

SRAM card

Time Ratio

Guaranteed value

Value in actual use

(Guaranteed time after

 

1

(MIN)

(TYP)

 

alarm occurrence)

 

 

 

 

Q2MEM-1MBS

0%

690hr

6336hr

8hr

Manufacturing

 

 

 

 

control number

 

 

 

 

 

 

 

 

" A"

100%

11784hr

13872hr

8hr

2

Q2MEM-2MBS

 

 

 

 

1: The energization time ratio denotes the ratio of power-on time in a day (24 hours) . (When power is on for 12 hours and off for 12 hours, the energization time ratio is

50%.)

2: The manufacturing control number is given on the SRAM card rear label (see below).

 

 

 

 

 

 

 

 

 

 

 

 

 

Manufacturing control number

CAUTION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Do not subject to mechanical shock!

Do not expose to extreme temperrature,

POINT

Remember that the SRAM card consumes battery power even when the battery is connected to the CPU module and the power is turned ON.

If the special relay SM51 (battery low latch) turns on, immediately replace the battery. If an alarm has not yet occurred, it is recommended to replace the battery periodically according to the conditions of use.

10 - 6

10 - 6