4.1 RS-232C Settings and Connection (Before Using Command Communications)
120
Connecting the RS-232C Cable
Recommended cable: Model 9638 RS-232C Cable (9pin-25pin/1.8m crossover cable)
The I/O connector is a DTE (Data Terminal Equipment) configuration.
Pin number 2, 3, 5, 7, and 8 are used in the instrument. The other pins are not used.
• When connecting the instrument to a controller (DTE), use a cross cable that satisfies the specifications of the instru-
ment’s connector and the controller’s connector.
• When using a USB-serial cable, you may need a gender converter and a straight-cross converter. Obtain models that
satisfy the specifications for the instrument’s connector and the USB-serial cable’s connector.
Pin No. Interchange circuit name
CCITT
circuit No.
EIA
abbreviation
JIS
abbreviation
Common
abbreviation
1 Data/channel receive carrier detection Carrier Detect 109 CF CD DCD
2 Received data Receive Data 104 BB RD RxD
3 Transmitted data Send Data 103 BA SD TxD
4 Data terminal ready Data Terminal Ready 108/2 CD ER DTR
5 Signal ground Signal Ground 102 AB SG GND
6 Data set ready DATA Set Ready 107 CC DR DSR
7 Request to send Request to Send 105 CA RS RTS
8 Clear to send Clear to Send 106 CB CS CTS
9 Ring indicator Ring Indicator 125 CE CI RI
Male 9-pin D-sub
#4-40 attaching screws
6 7 8 9
1 2 3 4 5
1 Connect the RS-232C cable to the instrument’s
RS-232C connector.
Be sure to secure it in place with the screws.
2 Set the controller’s communications protocol so
that it is the same as the instrument’s settings.
Configure the controller’s settings as follows:
• Start-stop synchronization
• Communication Speed: 9,600 bps/38,400 bps
(Use the same setting as the instrument.)
• Stop bit: 1 bits
• Data Bits: 8 bits
• Parity: None
• Flow control: None
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