50 097-55501-01 Issue 6 – June 2003
1
TimeHub 5500 System Guide
Figure 1-6. EC Card Front Panel Indicators
The indicators are, in order from top to bottom:
• Power LED. This LED will be green whenever the EC card is
properly powered.
• Fuse LED. The EC card has an on-board fuse. If the fuse becomes
open this indicator will illuminate red (assuming the expansion
shelf remains powered).
• Shelf Alarm LED. When red, this indicates that an alarm condition
is detected by the expansion controller card. The alarm will be
reported back through the master shelf management card. Specific
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