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Appendix B
Interfacing to a Serial Device
Interfacing the GPIB-232CV-A to a DCE without Handshaking
GPIB-232CV-A User Manual
Figure B-2 shows a properly configured 9-pin DTE to 9-pin DCE cable
including the hardware handshake lines RTS, CTS, and DTR. With this
configuration, the GPIB-232CV-A can function properly (handshake) on
buffer full conditions. Figure B-3 shows an equivalent 9-pin DTE to 25-pin
DCE cable configuration.
6
7
8
9
GPIB-232CV-A
9-pin DTE
Figure B-2. Cable Configuration for 9-pin DTE to 9-pin DCE with Handshaking
6
7
8
9
GPIB-232CV-A
9-pin DTE
Figure B-3. Cable Configuration for 9-pin DTE to 25-pin DCE with Handshaking
If your serial device does not require or use the hardware handshaking
protocol used by the GPIB-232CV-A, you have two options:
•
Use a minimum configuration cable which does not support
hardware handshaking and use XON/XOFF software handshaking
(if necessary). To create a minimum configuration cable, connect the
signals shown in bold italics in Table B-2.
1
5
1
5
B-4
5
9
8
7
6
1
Serial Device
9-pin DCE
1
14
15
16
17
18
19
20
8
21
9
22
10
23
11
24
12
25
13
Serial Device
25-pin DCE
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