Battery Life - Mitsubishi MELSEC- Q Q12PHCPU User Manual

10 MAINTENANCE AND INSPECTION

10.3.1 Battery life

10 - 5
(1) CPU module battery (Q6BAT) life
(a) The CPU module battery life is given below.
Energization
CPU Module
Time Ratio
Type
0%
30%
Q12PHCPU
50%
Q25PHCPU
70%
100%
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%.)
(b) The Q6BAT life is 10 years when it is used without connecting to the CPU
module.
(2) SRAM card battery life
The SRAM card battery life is indicated below.
Energization
SRAM card Time Ratio
0%
30%
Q2MEM-2MBS
50%
70%
100%
Q2MEM-1MBS 0%
Manufacturing 30%
control number
50%
" B"
70%
2
100%
Q2MEM-1MBS
0%
Manufacturing
control number
100%
" A"
2
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).
CAUTION
Do not subject to mechanical shock!
Do not expose to extreme temperrature,
Guaranteed value Value in actual use
1
(MIN)
1260hr
1800hr
2520hr
4200hr
10years
Guaranteed value Value in actual use
1
(MIN)
2400hr
2880hr
4320hr
6480hr
5.0years
2400hr
2880hr
4320hr
6480hr
5.0years
690hr
11784hr
Manufacturing control number
MELSEC-Q
Battery life
After SM51 is energized
(Guaranteed time after
(TYP)
alarm occurrence)
4228hr
6040hr
8456hr
14093hr
10years
Battery life
After SM51 is energized
(Guaranteed time after
(TYP)
alarm occurrence)
2.7years
3.6years
4.5years
5.0years
5.0years
2.7years
3.6years
4.5years
5.0years
5.0years
6336hr
13872hr
48hr
48hr
48hr
48hr
48hr
20hr
20hr
20hr
20hr
50hr
20hr
20hr
20hr
20hr
50hr
8hr
8hr
10 - 5