Table 2-2 Rs-232 Signals On J3 Serial Port; Table 2-3 Rs-422 4-Wire Signals On J3 Serial Port; Table 2-4 Rs-485 2-Wire Signals On J3 Serial Ports; Table 2-5 Jp11 And Jp12 Jumper Settings For Serial Port 1 (J3) - Lantronix xPico 110 User Manual

The J3 DB9M port is configured for RS232, RS422 (4-wire), or RS485 (2-wire) by jumper
settings on JP11 and JP12.
JP18 is for connection to the module second serial port through an RS232 transceiver. The pin
assignments for JP18 are listed below.
xPico® 110 Wired Device Server Module Evaluation Kit User Guide

Table 2-2 RS-232 Signals on J3 Serial Port

xPico 110 Evaluation Kit PIN FUNCTION
SERIAL PORTS
TX_232 (Data Out)
RX_232 (Data In)
CTS_232 (HW Flow Control Input)
RTS_232 (HW Flow Control Output)
DTR_232 (Modem Control Output)
DCD_232 (Modem Control Input)
GND (Ground)

Table 2-3 RS-422 4-Wire Signals on J3 Serial Port

xPico 110 Evaluation Kit PIN FUNCTION
SERIAL PORTS
TX- (Data Out)
RX+ (Data In)
TX+ (Data Out)
RX- (Data In)
GND (Ground)

Table 2-4 RS-485 2-Wire Signals on J3 Serial Ports

xPico 110 Evaluation Kit PIN FUNCTION
SERIAL PORTS
TX-/RX- (Data IO)
TX+/RX+ (Data IO)
GND (Ground)
Table 2-5 lists the jumper installation for each mode.

Table 2-5 JP11 and JP12 Jumper Settings for Serial Port 1 (J3)

xPico 110 Evaluation Kit Serial
Port 1 Mode (J3)
RS232 (Default)
RS485 2-wire
RS422 4-wire
DB9M
Pin #
3
2
8
7
4
1
5
DB9M
Pin #
3
2
7
8
5
DB9M
Pin #
3
7
5
JP11 JP12
OUT OUT
IN IN
IN OUT
2: Evaluation Kit
11