Contemporary Controls EISK5-100T/H Руководство по установке - Страница 3
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Power Considerations
Voltage within the specified range must deliver current that is commensurate with
power consumption. The recommended size for solid power conductors is 16–22
AWG; for stranded conductors, use 16–18 AWG. Ground is directly connected to
zero volts and the chassis is isolated from zero volts. Input connections are
reverse-polarity protected.
Network Connections
Auto-MDIX technology is employed so that either straight-through or crossover
cables can be used to connect to network interface adapters or to another hub.
LED Indicators
The ―PWR‖ LED glows solid green when the hub is properly powered. To aid in
troubleshooting, each port has two LEDs. The Port 1 LED labelled ―L‖ glows
solid if a link exists, flashes to show activity and shows data rate by colour: green
for 100 Mbps and yellow for 10 Mbps. The LED labelled ―D‖ glows solid green if
full-duplex is on or is unlit when that port is operating in half-duplex mode — but
in half-duplex operation it will flash if a collision occurs. The LEDs of Ports 2–5
are unlabeled but work the same.