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16 PCM-4894 User Manual
Serial ports connector (CN2)
The mainboard offers four serial ports: three RS-232 and one RS-
232/422/485. These ports allow you to connect them to serial
devices (mouse, printers, etc.).
COM 1-4 RS-232/422/485 serial ports (CN2)
COM1, COM2, COM3, COM4 RS-232/422/485 serial port (CN2)
PIN SIGNAL
PIN
SIGNAL
COM1
1
DCDA
2
DSRA
3
RXDA
4
RTSA
5
TXDA
6
CTSA
7
DTRA
8
RIA
9
GND
10
N.C.
COM2
11
DCDB
12
DSRB
(422TXD-/485DATA-)
13
RXDB
14 RTSB
(/)
15
TXDB
16
CTSB
()
17
DTRB
18
RIB
(422RXD-)
19
GND
20
N.C.
COM3
21
DCDC
22
DSRC
23
RXDC
24
RTSC
25
TXDC
26
CTSC
27
DTRC
28
RIC/+5V/+12V
29
GND
30
N.C.
COM4
31
DCDD
32
RSRD
33
RXDD
34
RTSD
35
TXDD
36
CTSD
37
DTRD
38
RID/+5V/+12V
39
GND
40
N.C.
Summary of Contents for PCM-4894
Page 14: ...8 PCM 4894 User Manual...
Page 56: ...50 PCM 4894 User Manual...
Page 72: ...A 66 PCM 4894 User Manual...
Page 77: ...Appendix C Optional Extras C 71 C Optional Extras APPENDIX...