14
3.10 Serial Port Connectors
The HS-1743 offers 16C550 compatible UARTs with Send/
Receive 16-byte FIFO serial ports and six internal 10-pin headers
for RS-232 and two RS-422/485 connectors.
z
CN7: COM 1/COM 2 Connector (DB9)
PIN Description PIN Description
1
DCD2
10
DCD1
2
RXD2
11
RXD1
3
TXD2
12
TXD1
4
DTR2
13
DTR1
5
GND
14
GND
6
DSR2
15
DSR1
7
RTS2
16
RTS1
8
CTS2
17
CTS1
9
RI2
18
RI1
z
CN8: COM 3/COM 4 Connector (2x10 Header)
PIN Description PIN Description
1
DCD3
2
DSR3
3
RXD3
4
RTS3
5
TXD3
6
CTS3
7
DTR3
8
RI3
9
GND
10
N/C
11
DCD4
12
DSR4
13
RXD4
14
RTS4
15
TXD4
16
CTS4
17
DTR4
18
RI4
19
GND
20
N/C
1
2
19
20
Summary of Contents for HS-1743
Page 14: ...8 3 2 Board Layout Top Side...