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PMC423* Port Serial, Front/Rear I/O
Publication No. RX-URMH 006 Rev. E.0
1.5 I/O Signal Pinouts
Each serial port has two control signals:
•
TX - Transmitted Data
•
RX - Received Data
To support differential signaling standards (e.g., RS422), each signal has a positive
and negative line. When using a single ended standard (e.g., RS232), use the negative
version.
All I/O signals are available both at the front panel connector and on the J4
“backplane” connector. The following table details all connections.
Table 1-1 I/O Signal Pinouts PMC423
Port
Signal
Front Panel Pin
J4 Pin
Positive Negative Positive Negative
1
RX
2
1
2
1
TX
4
3
4
3
2
RX
6
5
6
5
TX
8
7
8
7
3
RX
11
10
10
9
TX
13
12
12
11
4
RX
15
14
14
13
TX
17
16
16
15
5
RX
19
18
18
17
TX
21
20
20
19
6
RX
23
22
22
21
TX
25
24
24
23
7
RX
28
26
26
25
TX
30
29
28
27
8
RX
32
31
30
29
TX
34
33
32
31
9
RX
36
35
34
33
TX
38
37
36
35
10
RX
40
39
38
37
TX
42
41
40
39
11
RX
45
44
42
41
TX
47
46
44
43
12
RX
49
48
46
45
TX
51
50
48
47
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