12-34
Cisco 1240 Connected Grid Router Hardware Installation Guide
OL-26223-04
Chapter 12 Installing Battery Backup Units
BBU Technical Specifications
•
Charge Conditions, page 12-35
•
Operating and Storage Temperatures, page 12-35
•
Battery Life, page 12-35
Router Power Path Selection
During normal operation, the router is powered by the integrated AC power supply. The BBU enters
discharge mode and begins providing power to the router when the AC power is interrupted outside a
range of 85V to 250V for more than 20 ms. The BBU charges or discharges only; it does not support
both simultaneously.
Discharge Conditions
Table 12-1
Battery Backup Unit—Discharging Specifications
Discharge Conditions
Description
Power load
10 W
Duration
4 hours
Entry to discharge
1
1.
All conditions met.
•
BBU cable harness is installed
•
AC power (range of 85V to 250V) not detected for more than 20 ms
•
Remaining BBU capacity >5%
•
External ambient temperature is within -40 to 122°F (-40 to 50°C)
Exit discharge
2
2.
Any condition met and system is detected.
•
AC power restored in the range of 85V to 250V for more than 20 ms.
•
Remaining BBU capacity <5%
•
External ambient temperature is within -40 to 122°F (-40 to 50°C)