Installation guide

Compact Board PCM- 8500
Chapter 2 Quick Installation Guide
2
-
19
2.27 COM1~4 RS-232/422/485 Serial Port Connector (CN16)
Pin Signal Pin Signal
1
DCD1
2
RXD1
3
TXD1
4
DTR1
5
GND
6
DSR1
7
RTS1
8
CTS1
9
RI1
10
N.C
11
DC
D2
12
RXD2 (422RXD+)
13
TXD2
14
DTR2 (422RXD
-
)
15
GND
16
DSR2
17
RTS2
18
CTS2
19
RI2/+5V/+12V
20
N.C
21
DCD3
22
RXD3
23
TXD3
24
DTR3
25
GND
26
DSR
27
RTS3
28
CTS3
29
RI3
30
N.C
31
DCD4
32
RXD4
33
TXD4
34
DTR
4
35
GND
36
DSR4
37
RTS4
38
CTS4
39
RI4
40
N.C