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4 LED Indicators
The following figure shows the locations of the LED indicators:

4.1 LED Indicators

LED DISPLAYSTATE INTERPRETATION
PWR Power status ON The device is powered on.
OFF The device is powered off.
232 TX RS-232 TX ON RS-232 TX data is present
OFF No RS-232 TX data
232 RX RS-232 RX ON RS-232 RX data is present
OFF No RS-232 RX data
TXC RS-485 ON The driver is enabled.
Driver Enable OFF The driver is disabled and
is in tri-state (high-impedance).