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3.11 Serial Port Connectors
The HS-6254/HS-6654 offers NS16C550 compatible UARTs with
Read/ Receive 16-byte FIFO serial ports and four internal 10-pin
headers and one RS-422/485 connector.
CN29: COM 1 Connector (DB9)
PIN Description PIN Description
1
DCD
3
RXD
5
TXD
7
DTR
9
GND
NOTE:
CN29 is optional connector, if use CN29, 15-pin CRT connector
(CN25) will be disabled.
CN19/CN17/CN20/CN32: COM 1~COM 4 Connector (5x2
Header)
PIN Description PIN Description
1
DCD
3
RXD
5
TXD
7
DTR
9
GND
JP6: RS-422/485 Connector (3x2 Header, COM4)
PIN Description PIN Description
1
TX-
3
RX+
5
GND
NOTE:
The terminal resistance of RX & TX is set at 180
16
2
DSR
4
RTS
6
CTS
8
RI
2
DSR
4
RTS
6
CTS
8
RI
10
N/C
2
TX+
4
RX-
6
+5V
5
9
6
1
9
1
10
2
5
1
6
2
.
Ω
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