Connector Assignments
6. Connector Assignments
The number of serial interfaces and the physical layer selection is configured by software. Thus the
pin assignment of the DSUB37 is determined by software
6.1 4x RS-232-Interface
Device connector:
37-pin DSUB connector, female
Pin Position:
Pin Assignment:
Port
Signal
Pin
Signal
COM1
(Input)
DCD
1
20 DSR
(Input)
(Input)
Rx
2
21 RTS
(Output)
(Output)
Tx
3
22 CTS
(Input)
(Output)
DTR
4
23 RI
(Input)
(reference potential)
GND
5
24 DCD
(Input)
COM2
(Input)
DSR
6
25 Rx
(Input)
(Output)
RTS
7
26 Tx
(Output)
(Input)
CTS
8
27 DTR
(Output)
(Input)
RI
9
28 GND
(reference potential)
COM3
(Input)
DCD 10
29 DSR
(Input)
(Input)
Rx 11
30 RTS
(Output)
(Output)
Tx 12
31 CTS
(Input)
(Output)
DTR 13
32 RI
(Input)
(reference potential)
GND 14
33 DCD
(Input)
COM4
(Input)
DSR 15
34 Rx
(Input)
(Output)
RTS 16
35 Tx
(Output)
(Input)
CTS 17
36 DTR
(Output)
(Input)
RI 18
37 GND
(reference potential)
-
n.c. 19
Shield S
Signal Description:
Rx, Tx, DCD, DTR, RI,
DSR, RTS, CTS...
RS-232 signal lines of the corresponding COM port
Shield ...
shielding (connected with the case of the 37-pin DSUB connector)
n.c. ...
not connected
Page 14 of 17
Hardware Manual • Doc. No.: I.2328.21 / Rev. 1.0
CPCI-COM4
1
13
20
31
2
3
4
5
6
7
8
9
10
11
12
21
22
23
24
25
26
27
28
29
30
14
15
16
17
18
19
32
33
34
35
36
37
