22
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)
Bus-powered.
OFF
Local power (self-powered).
RESET
ON (amber)
Reset or uplink disconnected
or host powered off.
OFF
Not reset/Host connection
established.
PORTS 1–4
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. 1.5-amp short-circuit current limiting.
'
UPLINK
Green LED
ON (green)
Uplink power is ON.
Blinking green
Port TX or RX activity.
Содержание IC165A
Страница 32: ...NOTES...
Страница 33: ...NOTES...
