Advantech EKI-4524RI User Manual page 26

Chapter 3 Troubleshooting
Verify that you are using the right power cord/adapter. Please don't use a power
adapter with DC outputs higher than the power rating of this equipment, or it will be
damaged.
Select the proper UTP cable to construct the user network. Use unshielded twisted-pair
(UTP) or shielded twisted-pair (STP) cable for RJ-45 connections: 100Ω Category 3, 4
or 5 cable for 10Mbps connections, 100Ω Category 5 cable for 100Mbps connections,
or 100Ω Category 5e/above cable for 1000Mbps connections. Also be sure that the
length of any twisted-pair connection does not exceed 100 meters (328 feet).
Diagnosing LED Indicators
To assist in identifying problems, the switch can be easily monitored through panel
indicators, which describe common problems the user may encounter and where the
user can find possible solutions.
If the power indicator does not light up when the power cord is plugged in, you may
have a problem with power cord. Then check for loose power connections, power
losses or surges at power outlet. If you still cannot resolve the problem, contact the
local dealer for assistance.
If the LED indicators are normal and the connected cables are correct but the packets
still cannot be transmitted, please check the user system's Ethernet devices'
configuration or status.
EKI-4524RI & ARI_User Manual 18