User manual
13 Chapter 2 
2.3 LAN: Ethernet Connector
The UNO-4678 is equipped with a Realtek RTL8100 Ethernet LAN con-
troller and UNO-4678 is equipped with a Realtek RTL8139 Ethernet 
LAN controller, which are fully compliant with IEEE 802.3u 10/
100Base-T CSMA/CD standards. The Ethernet port provides a standard 
RJ-45 jack on board, and LED indicators on the front side to show its 
Link (Green LED) and Active (Yellow LED) status.
2.4 Power Input
The UNO-4678 comes with a Phoenix connector that carries 9~36 VDC 
external power input, and features reversed wiring protection, it will not 
cause any damage to the system by reversed wiring of ground line and 
power line. Please refer to Appendix A.6
UNO-4678 supports two individual power inputs (P1/P2). If the voltage 
of power input < 9 V
DC
, it will switch to another power input and the 
FAULT LED will be enabled.
2.5 PS/2 Keyboard and Mouse Connector
The UNO-4678 provides a PS/2 keyboard and PS/2 mouse connector. A 
6-pin mini-DIN connector is located on the front panel of the UNO-4678. 
The UNO-4678 comes with an adapter to convert from the 6-pin mini-
DIN connector to two 6-pin mini-DIN connectors for PS/2 keyboard and 
PS/2 mouse connection. Please refer to Appendix A.7.
2.6 USB Connector
The UNO-4678 provides two USB interface connectors, which provide 
complete Plug & Play and hot swapping for up to 127 external devices. 
The USB interface complies with USB UHCI, Rev. 1.1 compliant of 
UNO-4678. The USB interface complies with USB UHCI, Rev. 2.0 com-
pliant of UNO-4678. The USB interface can be disabled in the system 
BIOS setup. Please refer to Appendix A.8 for its pin assignments.
Note It is recommended that a CD-ROM attached by 
USB is used to install Windows or other operat-
ing systems.










