Serial Port Connectors - Boser HS-2621 Manual

3.10 Serial Port Connectors

The HS-2621 offers NS16C550 compatible UARTs with Send/
Receive 16-byte FIFO serial ports.
CN6: COM 1 ~ COM 4 Connector (2x20 Header)
PIN Description PIN Description
1 DCD1
3 RXD1
5 TXD1
7 DTR1
9 GND
11 DCD2
13 RXD2
15 TXD2
17 DTR2
19 GND
21 DCD3
23 RXD3
25 TXD3
27 DTR3
29 GND
31 DCD4
33 RXD4
35 TXD4
37 DTR4
39 GND
CN9: RS-422/485 Connector (3x2 Header, COM 4)
PIN Description PIN Description
1 TX-
3 RX+
5 GND
NOTE: The terminal resistance of RX & TX is set at 180
14
2 DSR1
4 RTS1
6 CTS1
8 RI1
10 Don't Use
12 DSR2
14 RTS2
16 CTS2
18 RI2
20 Don't Use
22 DSR3
24 RTS3
26 CTS3
28 RI3
30 Don't Use
32 DSR4
34 RTS4
36 CTS4
38 RI4
40 Don't Use
2 TX+
4 RX-
6 N/C
1 2
39 40
5 1
6 2
.
Ω