Intermec MobileLAN power 12, Руководство пользователя

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B-9
Commonly Asked Technical Support Questions (continued)
Problem/Question Possible Solution/Answer
A Power Not Active LED
on one port is lit, and the
end device is not
operating. Wait 5 to 10 seconds while the Power Not
Active LED is on and the end device is
connected—if the LED changes to Power
Active, there was a charged capacitor in the end
device, which was discharged after being
plugged in. The end device can then be detected
and activated.
Verify that you are not using any crossover
cable between the Power Bridge Power & Data
Out port and the end device.
The end device may require an external splitter.
If an external splitter is already in use, replace it
with a new splitter. If this is effective, discard
the faulty splitter.
You may have a faulty connection, a short on
the long cable, or a faulty RJ-45 connection
along the line. Bypass the long twisted pair
cable and bring the end device closer to the
Power Bridge. Connect it to one of the ports
using a short cable.
You may have a faulty port or RJ-45
connection. Move the device into a different
output port.
You may have a faulty port or an internal short
in the RJ-45 socket. Unplug the device and
verify that the Power Not Active LED turns off.
One of the ports is
powering an end device
without turning the
Power Active LED on. Reconnect the end device to a different Data &
Power Out port—if the LED turns on, there is a
fault in the previous output port (probably a
faulty LED).
Is it safe to keep the
Power Bridge running
while a Power Not Active
LED is on? Yes, this is a safe condition. Power Not Active
conditions mean that a non-power-ready device
was detected, terminals 4/5 and 7/8 are shorted
together or forced external power feed into the
port. During these conditions, port power is
disconnected; however, a single low power
pulse every 5 seconds continues to sense the
line.