3.8 Examples for the cable link between the interface and
an IBM
®
-PC
Example for 9-way PC links
A-series instruments A-S- A-S- PC- PC- IBM-PC
Remark for A-side Desig. Pin Pin Desig. Remark for PC side
leave unconnected 1 1 DCD possibly connect to 6
link TxD 2 2 RxD link
link RxD 3 3 TXD link
4 4 DTR
link GND 5 5 GND link
link DTR 6 6 DSR link
77RTS
link RTS 8 8 CTS link
Shield Shield 9 9 RI possibly connect to 4
Example for 25-way PC links
A-series instruments A-S- A-S- PC- PC- IBM-PC
Remark for A-side Desig. Pin Pin Desig. Remark for PC side
leave unconnected 1 8 DCD possibly connect to 6
link TxD 2 3 RxD link
link RxD 3 2 TXD link
4 20 DTR
link GND 5 7 GND link
link DTR 6 6 DSR link
74RTS
link RTS 8 5 CTS link
Shield Shield 9 22 RI possibly connect to 20
Example for 25-way PC / modem links
A-series instruments A-S- A-S- Modem- Modem- Modem
Remark for A-side Desig. Pin Pin Desig. Remark for Modem Side
leave unconnected 1 8 DCD leave unconnected Out
link TxD 2 2 TxD link In
link RxD 3 3 RXD link Out
4 6 DSR Out
link GND 5 7 GND link --
link DTR 6 20 DTR link In
7 5 CTS Out
link RTS 8 4 RTS link In
Shield Shield 9 22 RI leave unconnected Out
34
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