eBOX560-500-FL Series U
ser’s Manual
Jumper Setting & Connector
23
3.3.4 COM Serial Port Connector
The system has two serial ports. COM1 is RS-232/422/485 ports and COM2 is RS-232,
please refer to Chapter 4 for the detail of BIOS setting. The lower connector (CN7A) is for
COM2 and the upper connector (CN7B) is for COM1.
CN7B
Pin
RS-232
RS-422
RS-485
CN7B
CN7A
1
DCD, Data Carrier Detect
TX-
Data-
2
RXD, Receive Data
TX+
Data+
3
TXD, Transmit Data
RX+
No use
4
DTR, Data Terminal Ready
RX-
No use
5
GND, Ground
No use
No use
6
DSR, Data Set Ready
No use
No use
7
RTS, Request To Send
No use
No use
8
CTS, Clear To Send
No use
No use
9
RI, Ring Indicator
No use
No use
CN7A
Pin
Signal
10
Data Carrier Detect (DCD)
11
Receive Data (RXD)
12
Transmit Data (TXD)
13
Data Terminal Ready (DTR)
14
Ground (GND)
15
Data Set Ready (DSR)
16
Request to Send (RTS)
17
Clear to Send (CTS)
18
Ring Indicator (RI)
