Issue
- How long will a UNC-520 hold the date & time if AC power and the backup battery are disconnected?
- How long will a UNC-520 hold the date & time if AC power is disconnected but the backup battery remains connected?
Environment
UNC-520 Universal Network Controller
Cause
UNC-520 provide real-time clock and need to maintain the information during power failures.
Resolution
- Approximately one hour. This is done by a 1200 µF 10 Vdc capacitor that backs up the real-time clock chip.
- Over one month.
