Manual

ECN-680A-H61 Embedded System
Page 36
Pin Description Pin Description
1 -NDCD3 2 -NDSR3
3 NSIN3 4 -NRTS3
5 NSOUT3 6 -NCTS3
7 -NDTR3 8 -XRI3
9 GND 10 N/A
Table 3-2: RS-232 Serial Ports Pinouts (COM3)
The pinouts of the RS-422/485 serial port are shown below.
Pin Description Pin Description
1 RXD485# 2 N/A
3 RXD485 4 N/A
5 TXD485 6 N/A
7 TXD485# 8 N/A
Table 3-3: RS-422/485 Serial Port Pinouts (COM4)
3.11.6 RJ-45 Serial Port Connection
There is one RJ-45 connector of the ECN-680A-H61 for serial device connection. Follow
the steps below to connect a serial device to the RJ-45 serial port connector of the
ECN-680A-H61.
Step 1: Locate the RJ-45 serial port. The location of the RJ-45 serial port is shown in
Chapter 1.
Step 2: Connect the RJ-45 to COM port cable to the ECN-680A-H61. Insert the RJ-45
connector end of cable into the RJ-45 serial port. See Figure 3-28.
Step 3: Connect the serial device. Connect a serial device to the DB-9 connector end
of the cable. See Figure 3-28.