BBS-1080S Datasheet, PDF (33/88 Pages) BOSER Technology Co., Ltd – 19” 1U Height Half-size Bare Bone System with Pentium 4 Embedded Engine Board & 180W P4 ATX P/S

4.10 Serial Port Connectors
The HS-4701 offers two NS16C550 compatible UARTs with
Read/Receive 16-byte FIFO serial ports and four internal 10-pin
headers. There is one RS-422/485 connector.
CN11~CN14: COM1~COM4 Connectors (5x2 Header)
PIN Description PIN Description
1
DCD0
2
3
RXDD0
4
5
TXDD0
6
7
DTR0
8
9
GND
10
11
DCD1
12
13
RXDD1
14
15
TXDD1
16
17
DTR1
18
19
GND
20
21
DCD2
22
23
RXDD2
24
25
TXDD2
26
27
DTR2
28
29
GND
30
31
DCD3
32
33
RXDD3
34
35
TXDD3
36
37
DTR3
38
39
GND
40
DSR0
RTS0
CTS0
RI0
N/C
DSR1
RTS1
CTS1
RI1
N/C
DSR2
RTS2
CTS2
RI2
N/C
DSR3
RTS3
CTS3
RI3
N/C
DCD0
RXDD0
TXDD0
DTR0
GND
DCD1
RXDD1
TXDD1
DTR1
GND
DCD2
RXDD2
TXDD2
DTR2
GND
DCD3
RXDD3
TXDD3
DTR3
GND
12
DSR0
RTS0
CTS0
RI0
N/C
DSR1
RTS1
CTS1
RI1
N/C
DSR2
RTS2
CTS2
RI2
N/C
DSR3
RTS3
CTS3
RI3
N/C
39 40
COM1
COM2
COM3
COM4
CN9: RS-422/485 Connector
PIN
1
3
5
7
9
Description
TX-
RX+
GND
RTS+
CTS-
PIN
2
4
6
8
10
Description
TX+
RX-
RTS-
CTS+
N/C
TX- 1
RX+ 3
GND 5
RTS+ 7
CTS- 9
2 TX+
4 RX-
6 RTS-
8 CTS+
10 N/C
25