13
3.9 Serial Port Connectors
The HS-2616/HS-2616M offers NS16C550 compatible UARTs
with Read/ Receive 16-byte FIFO serial ports and internal 10-pin
headers and RS-422/485 connector.
CN3/CN2: COM 1/COM 2 Connector (5x2 Header)
PIN Description PIN Description
1
DCD
2
DSR
3
RXD
4
RTS
5
TXD
6
CTS
7
DTR
8
RI
9
GND
10
N/C
1
9
10
2
CN8: RS-485 Connector (3x2 Header, COM4)
PIN Description PIN Description
1
TX-
2
TX+
3
RX+
4
RX-
5
GND
6
VCC
1
5
6
2
NOTE:
The terminal resistance of RX & TX is set at 180
Ω
.
JP4: COM 2 use RS-232 or RS-485 Select
Options
Settings
RS-232 (default)
Open
RS-485 by Auto (*1)
Short 1-2, 3-4, 5-7, 8-10
RS-485 by –RTS (*-1)
Short 1-2, 3-4, 7-9, 8-10
RS-485 Full Duplex (*2)
Short 1-2, 3-4, 6-8
1
9
10
2
NOTE:
*1: 2-wires RS-485 function
*2: 4-wires point-to-point full duplex function
4-wires point-to-point full duplex RS-485
