Neousys Technology POC-200 - COM Ports on POC-200;210

POC-200 Series User’s Manual
Copyright © 2014 Neousys Technology Inc. All Right Reserved. Page 26 of 78
COM1 COM2
Pin# RS-232 Mode RS-422 Mode
RS-485 Mode
(Two-wire 485)
RS-232 Mode
1
DCD DCD
2
RX 422 TXD+ 485 TXD+/RXD+
RX
3
TX 422 RXD+ TX
4
DTR 422 RXD- DTR
5
GND GND GND GND
6
DSR DSR
7
RTS RTS
8
CTS 422 TXD- 485 TXD-/RXD- CTS
9
RI RI
2.3.4 COM Ports on POC-200/210
POC-200 and POC-210 provide four COM ports via four 9-pin D-Sub male connectors on
the back panel for communicating with external devices. They are implemented using
industrial-grade ITE8783 Super IO chip (-40 to 85°C) and provide up to 115200 bps baud
rate.
COM1/COM3 are software-selectable RS-232/422/485 ports and COM2/COM4 support
RS-232 only. The operation mode of COM1/COM3 can be set in BIOS setup utility (refer to
section 4.1.1/4.1.2 for detail). The following table describes the pin definition of COM ports.