User`s manual

SBC86831 Series All-In-One Mini ITX Board User’s Manual
Jumpers and Connectors
22
2.4.2 Serial Port Connectors: CN2, CN3, CN4
Please refer to the RS-232 pin assignment as listed below:
Pin Description Pin Description
1
Data Carrier Detect
(DCD)
2
Data Set Ready
(DSR)
3 Receive Data (RXD) 4
Request to Send
(RTS)
5 Transmit Data (TXD) 6 Clear to Send (CTS)
7
Data Terminal Ready
(DTR)
8 Ring Indicator (RI)
9 Ground (GND) 10 NC
CN2, CN3, CN4
2.4.3 Digital I/O Port (DIO) Connector: CN5
The board is equipped an 8-channel digital I/O connector CN5 that
meets requirements for a system customary automation control. The
digital I/O can be configured to control cash drawers, sense warning
signals from an Uninterrupted Power System (UPS), or perform store
security control. The digital I/O is controlled via software programming.
Pin Signal Pin Signal
1 Digital Input 0 2 Digital Output 0
3 Digital Input 1 4 Digital Output 1
5 Digital Input 2 6 Digital Output 2
7 Ground(GND) 8 Digital Output 3
9 Ground(GND) 10 Digital Output 4
CN5