MSI MS-9A78B1, Manual, Page: 13 / 54

1-4
Overview MS-9A78B1
2
RS-232 Serial Port: COM2/3/4/5 (0V/5V/12V)
The serial port is a 16550A high speed communications port that sends/
receives 16 bytes FIFOs. It supports barcode scanners, barcode printers, bill
printers, credit card machine, etc.
1 5
6 9
RS-232
PIN SIGNAL DESCRIPTION
1
2
3
4
5
6
7
8
9
NDCD
NSIN
NSOUT
NDTR
GND
NDSR
NRTS
NCTS
VCC
Data Carrier Detect
Signal In
Signal Out
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
5V or 12V selected by jumper
3
USB 20 Port
The USB (Universal Serial Bus) port is for attaching USB devices such as key-
board, mouse, or other USB-compatible devices. It supports up to 480Mbit/s
(Hi-Speed) data transfer rate.
4
Security Lock Port
This security lock port allows users to secure the system in place with a key or
some mechanical PIN device and attached through a rubberised metal cable.
The end of the cable has a small loop which allows the whole cable to be looped
around a permanent object, such as a heavy table or other similar equipment,
thus securing the system in place.
5
Antenna Connector
This connector allows you to connect an external antenna for wireless LAN.