Allen-Bradley ControlLogix System 1756-L1 User Manual page 405

If the BAT LED turns on when you apply power to the controller, the battery life may be
IMPORTANT
less then the table below indicates. Some of the battery life may have been used up
while the controller was off and unable to turn on the BAT LED.
Table 25.A Worst-case estimates of battery life
Controller: Temperature:
1756-L1 60° C
25° C
0° C
1756-L1M1 60° C
25° C
0° C
1756-L1M2 60° C
25° C
0° C
1756-L1M3 60° C
25° C
0° C
1756-L55M12 60° C
1756-L55M13
25° C
0° C
1756-L55M14 60° C
25° C
0° C
1756-L55M16 60° C
25° C
0° C
1756-L55M22 Use the values for the 1756-L55M13 controller.
1756-L55M23
1756-L55M24 Use the values for the 1756-L55M14 controller.
1756-L63 60° C
25° C
0° C
Allen-Bradley HMIs
Time before BAT LED turns on:
Power off 100% Power off 50%
8 months 8 months
18.5 months 30.5 months
20.2 months 33.7 months
5.6 months 8 months
13.6 months 22.9 months
16.8 months 27.9 months
4 months 7.4 months
11.7 months 20.1 months
16.0 months 26.6 months
2.6 months 4.9 months
9.1 months 16.2 months
14.4 months 24.4 months
57 days 110 days
63 days 123 days
60 days 118 days
29 days 57 days
30 days 61 days
24 days 48 days
15 days 30 days
13 days 27 days
6 days 12 days
22 days 43 days
21 days 42 days
14 days 28 days
Maintain the 1756-BA1 Battery
Time after BAT LED turns on
and then power off 100%:
Yearly
decrease:
24% 16 days
16% 28 days
16% 31 days
24% 8 days
16% 20 days
16% 25 days
24% 6 days
16% 18 days
16% 24 days
24% 4 days
16% 14 days
16% 22 days
23% 69 hours
17% 76 hours
17% 73 hours
23% 35 hours
17% 37 hours
17% 30 hours
23% 18 hours
17% 16 hours
36% 7 hours
23% 6 hours
17% 28 hours
17% 2.5 days
Publication 1756-UM001E-EN-P - August 2002
25-3