Serial Port Connectors - BOSER Technology HS-7000 Manual

3.12 Serial Port Connectors

The HS-7000 offers ONE NS16C550 compatible UARTs with
Read/Receive 16-byte FIFO serial ports and two internal 10-pin
headers.
CN20 and CN21: COM1/COM2 Connectors (5x2 Header)
PIN Description
1
3
5
7
9
JP2: RS-422/485 Enabled/Disabled Select
Open
Short
JP5: RS-422/485 Transceiver Enabled/Disabled Select
JP5
Short 1-2
Short 3-4
The onboard COM2 may be configured as RS-232, RS-422/485. If we
RS-422/485, please connect device to CN12.
CN12: RS-422/485 Connector
PIN Description
1
3
5
7
9
16
PIN
DCD 2
RXD 4
TXD 6
DTR 8
GND 10
2 4 6 8 10
1 3 5 7 9
JP2 Description
Disabled
Enabled (default)
Description
Always Enable
Enable by "-RTS" signal
PIN
TX- 2
RX+ 4
GND 6
RTS+ 8
CTS- 10
Description
DSR
RTX
CTX
RI
N/C
Description
TX+
RX-
RTS-
CTS+
N/C