8.3 Selecting the Connections and Protocol
103
8
Chapter 8 RS-232C/GP-IB/LAN Interfaces
Connecting to a PC/
AT-Compatible (DOS/
V) Machine
Use a crossover cable with female 9-pin D-sub connectors.
Connecting to an NEC
PC9801 or PC9821
Series Desktop PC
(excluding NX)
Use a crossover cable with a female 9-pin D-sub and a male 25-pin D-sub
connector.
As the figure shows, RTS and CTS pins are shorted together and crossed to
DCD in the other connector.
Note that the combination of a dual male 25-pin D-sub cable and a 9- to 25-pin
adapter cannot be used.
Recommended cable:
HIOKI
Model 9637 RS-232C
CABLE (1.8 m)
Crossover Wiring
Female 9-pin
D-sub
Model BT3562(-01),
BT3563(-01) end
Female 9-pin
D-sub
PC/AT-end
Pin No. Pin No.
DCD 1 1 DCD
RxD 2 2 RxD
TxD 3 3 TxD
DTR 4 4 DTR
GND 5 5 GND
DSR 6 6 DSR
RTS 7 7 RTS
CTS 8 8 CTS
9 9
Recommended cable:
HIOKI
Model 9638 RS-232C
CABLE (1.8 m)
Crossover Wiring
Female 9-pin
D-sub
Model BT3562(-01),
BT3563(-01) end
Male 25-pin
D-sub
PC-end
Pin No. Pin No.
DCD 1
RxD 2 2 TxD
TxD 3 3 RxD
DTR 4 4 RTS
GND 5 5 CTS
DSR 6 6 DSR
RTS 7 7 GND
CTS 8 8 DCD
9 20 DTR
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