3. External Connection
COM-2C-PE, COM-4C-PE, COM-8C-PE
39
Pin No. Signal
name
Pin No. Signal
name
Pin
No.
Signal
name
Pin No. Signal
name
78
N.C.
59
DSR 1
39
RTS 1
20
TxD 1
77
SG
58
DCD 1
38
CTS 1
19
RxD 1
76
N.C.
57
RI 1
37
DSR 2
18
DTR 1
75
SG
56
DCD 2
36
RTS 2
17
TxD 2
74
RI 2
55
DTR 2
35
CTS 2
16
RxD 2
73
N.C.
54
DSR 3
34
RTS 3
15
TxD 3
72
SG
53
DCD 3
33
CTS 3
14
RxD 3
71
DSR 4
52
RI 3
32
RTS 4
13
DTR 3
70
SG
51
DCD 4
31
CTS 4
12
TxD 4
69
RI 4
50
DTR 4
30
DSR 5
11
RxD 4
68
SG
49
DCD 5
29
RTS 5
10
TxD 5
67
RI 5
48
DTR 5
28
CTS 5
9
RxD 5
66
N.C.
47
DSR 6
27
RTS 6
8
TxD 6
65
SG
46
DCD 6
26
CTS 6
7
RxD 6
64
N.C.
45
RI 6
25
DSR 7
6
DTR 6
63
SG
44
DCD7
24
RTS 7
5
TxD 7
62
RI 7
43
DTR 7
23
CTS 7
4
RxD 7
61
N.C.
42
DSR 8
22
RTS 8
3
TxD 8
60
SG
41
DCD 8
21
CTS 8
2
RxD 8
40
RI
8
CN1
1
21
40
60
20
39
59
78
1
DTR
8
Figure 3.14. Pin Assignments of Interface Connector < COM-8C-PE >
Thickness of the sheet metal
(about 1.0mm)
PC case
Bracket
Circuit
boards
Thickness of
the bracket (0.8mm)
The slot
opening width
Cable side
connectors
The connector used for COM-8C-PE has a wide interpin space and is highly reliable. In the case of a PC with a narrow
slot opening, a gap might be created as wide as the thickness of the sheet metal of the PC when an external cable is
connected, preventing the connector from being fitted properly. If the thickness of the sheet metal is less than 1.5mm
(typically about 1.0mm), simply tighten the adjusting screw located on the side of the connector to install it properly.
The connector should function without a problem.
Figure 3.15. The note about external connection < COM-8C-PE >
