DeLOCK 87586 Manual Del Usuario página 3

English
Status LED
Rx - Green
Tx - Yellow
DIP switch
1 = Auto RS-422/485 (default)
This COM can automatically detect the state of RS-422 full duplex or RS-485 half
duplex and control the data transmission and receiving wires at the same port.
2 = RS-422 (4-wire RS-485)
This COM port runs as RS-422 or RS-485 full duplex mode.
Jumper Settings
This adapter has TX and RX termination resistors for each serial port. You can
modify these jumper settings to avoid impedance problems. To do this, open the
metal cover and set the jumper to enable for the 120 ohm termination resistor.
The factory setting of the jumper is OPEN (120 ohm termination resistors are
disabled).
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