19 serial port connectors (rs-232/422/485), Table 3-20: serial port connector pinouts – IEI Integration NOVA-HM551 v1.10 User Manual
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NOVA-HM551 5.25" SBC
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Pin Description
Pin Description
1
DATA CARRIER DETECT (DCD1#)
2
DATA SET READY (DSR1#)
3
RECEIVE DATA (RXD1)
4
REQUEST TO SEND (RTS1#)
5
TRANSMIT DATA (TXD1)
6
CLEAR TO SEND (CTS1#)
7
DATA TERMINAL READY (DTR1#)
8
RING INDICATOR (RI1#)
9
GND 10
GND
11
DATA CARRIER DETECT (DCD2#)
12
DATA SET READY (DSR2#)
13
RECEIVE DATA (RXD2)
14
REQUEST TO SEND (RTS2#)
15
TRANSMIT DATA (TXD2)
16
CLEAR TO SEND (CTS2#)
17
DATA TERMINAL READY (DTR2#)
18
RING INDICATOR (RI2#)
19
GND 20
GND
21
DATA CARRIER DETECT (DCD3#)
22
DATA SET READY (DSR3#)
23
RECEIVE DATA (RXD3)
24
REQUEST TO SEND (RTS3#)
25
TRANSMIT DATA (TXD3)
26
CLEAR TO SEND (CTS3#)
27
DATA TERMINAL READY (DTR3#)
28
RING INDICATOR (RI3#)
29
GND 30
GND
31
DATA CARRIER DETECT (DCD4#)
32
DATA SET READY (DSR4#)
33
RECEIVE DATA (RXD4)
34
REQUEST TO SEND (RTS4#)
35
TRANSMIT DATA (TXD4)
36
CLEAR TO SEND (CTS4#)
37
DATA TERMINAL READY (DTR4#)
38
RING INDICATOR (RI4#)
39
GND 40
GND
Table 3-20: Serial Port Connector Pinouts
3.2.19 Serial Port Connectors (RS-232/422/485)
CN Label:
COM5, COM6
CN Type:
14-pin header (2x7)
CN Location:
CN Pinouts:
Used for RS-232/422/485 communications.