IEI Technology HTB-100-HM170, User Manual

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HTB-100-HM170 Medical Box PC
Page 24
3.7 Serial Device Connection
The HTB-100-HM170 series has four isolated serial ports on the front panel, including two
RS-232/422/484 ports (COM1 and COM2) and two RS-232 ports (COM3 and COM4). The
pinouts of the serial ports are listed in the following sections.
NOTE:
The default settings for COM1 and COM2 are set to RS-232. To
configure the COM port mode, please change the BIOS options in
Advanced  Super IO Configuration  Serial Port Configuration (refer
to
Section 4.3.3.1.1
and
4.3.3.1.2
).
3.7.1 RS-232 Serial Port (COM3, COM4)
The pinouts of the RS-232 serial port are listed in the following table.
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1 DCD 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 RI
Table 3-1: RS-232 Serial Port (COM1) Pinouts