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Rockwell Automation Publication 1756-UM001O-EN-P - October 2014
Chapter 3
Start Using the Controller
Estimate 1756-BA2 Battery Life After Warnings
Use this table to estimate the battery life after the low-battery warnings are
indicated. Use these times even if the controller does not have power because
there is a small power-drain on the battery.
IMPORTANT
When you power up the controller, see if there is a low-battery warning. If
you get a low-battery warning for the first time, you have less battery life
than this table shows. While powered down, the controller still drains the
battery but it cannot give the low-battery warning.
Temperature 2.54 cm (1 in.)
Below the Chassis, max
Power Cycles
Battery Life After the BAT Status Indicator Turns Red (worst case)
Project Size
1 MB
2 MB
4 MB
8 MB
16 MB
0…20 °C (32…68 °F)
3 per day
26 weeks
18 weeks
12 weeks
9 weeks
5 weeks
1 per day
26 weeks
26 weeks
26 weeks
22 weeks
13 weeks
1 per month
26 weeks
26 weeks
26 weeks
26 weeks
26 weeks
21…40 °C (69.8…104 °F)
3 per day
18 weeks
14 weeks
10 weeks
8 weeks
5 weeks
1 per day
24 weeks
21 weeks
18 weeks
16 weeks
11 weeks
1 per month
26 weeks
26 weeks
26 weeks
26 weeks
26 weeks
41…45 °C (105.8…113 °F)
3 per day
12 weeks
10 weeks
7 weeks
6 weeks
4 weeks
1 per day
15 weeks
14 weeks
12 weeks
11 weeks
8 weeks
1 per month
17 weeks
17 weeks
17 weeks
17 weeks
16 weeks
46…50 °C (105.8…113 °F)
3 per day
10 weeks
8 weeks
6 weeks
6 weeks
3 weeks
1 per day
12 weeks
11 weeks
10 weeks
9 weeks
7 weeks
1 per month
12 weeks
12 weeks
12 weeks
12 weeks
12 weeks
51…55 °C (123.8…131 °F)
3 per day
7 weeks
6 weeks
5 weeks
4 weeks
3 weeks
1 per day
8 weeks
8 weeks
7 weeks
7 weeks
5 weeks
1 per month
8 weeks
8 weeks
8 weeks
8 weeks
8 weeks
56…60 °C (132.8…140 °F)
3 per day
5 weeks
5 weeks
4 weeks
4 weeks
2 weeks
1 per day
6 weeks
6 weeks
5 weeks
5 weeks
4 weeks
1 per month
6 weeks
6 weeks
6 weeks
6 weeks
6 weeks
EXAMPLE
Under these conditions, the battery lasts at least 20 months before the BAT
status indicator turns red:
•
The maximum temperature 2.54 cm (1 in.) below the
chassis = 45 °C (113 °F).
•
You cycle power to the controller three times per day.
•
The controller contains an 8 MB project.
Summary of Contents for 1756-L63XT
Page 4: ...4 Rockwell Automation Publication 1756 UM001O EN P October 2014 Summary of Changes Notes...
Page 18: ...18 Rockwell Automation Publication 1756 UM001O EN P October 2014 Preface Notes...
Page 136: ...136 Rockwell Automation Publication 1756 UM001O EN P October 2014 Chapter 8 I O Modules...
Page 210: ...210 Rockwell Automation Publication 1756 UM001O EN P October 2014 Index Notes...
Page 211: ......
