VX121P/151P/171P(-QM57)
User’s manual rev.0.0 (Preliminary)
MU-C656.xxxxxxxxxx r.0.0-EN
49 of 68
8.12 Serial ports
The Panel PC is equipped with four RS232 serial ports NS16C550 compatible.
The COM4 serial port is reserved for the touchscreen controller (option).
The DB9-M serial port connectors COM1-2 and COM3 (option) are on the I/O
panel. The following table indicates the pinout of the RS232 COM1-3 connectors.
Caution
Do not connect/disconnect COM cables with the Panel PC or the
external apparatus switched on.
Notice
For COM port connection use a shielded cable. The max. length of
the RS232 connection is 15m. The cases of the DB9-M connectors
are connected by the metal chassis to the internal 0V.
The BIOS Setup provides a menu to set the serial port settings (address/IRQ).The
COM1-3 labels on the Panel PC refer to the default BIOS Setup as set at the
factory. If you change the serial port settings the reference could mismatch.
Refer to the CPU board user’s manual for further information.
8.13 Keyboard/mouse interface
Two PS/2 style connectors on the I/O panel allow connection of external keyboard
and mouse. The mouse connector is green while the keyboard one is violet.
Caution
Do not connect or disconnect the external keyboard or mouse when
the Panel PC is switched on. Switch off input power before
connecting or disconnecting the keyboard or the mouse.
Pin
Signal
Description
1
DCD
Carrier Detect
2
RXD
Received Data
3
TXD
Transmitted Data
4
DTR
Data Terminal Ready
5
GND
signal GROUND
6
DSR
Data Set Ready
7
RTS
Request To Send
8
CTS
Clear To Send
9
RI
Ring Indicator or Reserved
