USB DIRECTOR/4-PORT HUB
Table 4-1. LED Functions
| LED | Position |
| Function |
|
|
|
|
|
| POWER | ON (green) |
| Power ON. |
|
| OFF |
| No power or low input voltage |
|
|
|
| (< 3.5 VDC). |
|
|
|
|
|
| BUS/LOCAL | ON (green) |
| |
|
| OFF |
| Local power |
|
|
|
|
|
| RESET | ON (amber) |
| Reset or uplink disconnected |
|
|
|
| or host powered off. |
|
| OFF |
| Not reset/Host connection |
|
|
|
| established. |
|
|
|
|
|
| PORTS | ON (green) |
| Individual port power. Enabled |
|
|
|
| by the host and +5 VDC |
|
|
|
| applied. |
|
| OFF |
| Disabled by host because of |
|
|
|
| device status or overcurrent |
|
|
|
| (NOTE 1), thermal trip (NOTE |
|
|
|
| 2), or short circuit (NOTE 3), |
|
|
|
| or low input voltage. |
|
| NOTE |
| |
| 1. Overcurrent trip point set between 0.6 and 1.5 amps, 0.6 amp | |||
| continuous current per port maximum. |
| ||
| 2. Power vs. time algorithm for thermal trip point. | |||
| 3. |
| ||
|
|
|
|
|
' | UPLINK |
|
|
|
| Green LED | ON (green) |
| Uplink power is ON. |
|
| Blinking green |
| Port TX or RX activity. |
|
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