Yokogawa DR240 Manual de usuario Pagina 14

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IM DR231-11E
2.3 RS-232-C Interface Connection
When connecting this instrument to a personal computer, first it is necessary to match settings such
as handshake format, data transmission speed, and data format at the computer’s side. For details
relating to these settings, refer to the description on this and following pages. Furthermore, make
sure to use an interface cable which matches this instrument’s specifications.
Connector and Signal Names
2
3
4
5
7
20
Numeric values in the above figure indicate Pin Nos.
2.TXD (Send Data) : Data transmitted to the host computer.
Signal direction : Output.
3.RXD (Received Data) : Data received from the host computer.
Signal direction : Input.
4.RTS (Request to Send) : Handshake signal used for reception of data from the host computer.
Signal direction : Output.
5.CTS (Clear to Send) : Handshake signal used for transmission of data to the host
computer.
Signal direction : Input.
7.GND (Signal Ground) : Signal ground connection.
20.DTR (Equipment Ready) : Handshake signal used for reception of data from the host
computer.
Signal direction : Output.
Pin Nos. 1, 6 and 8 to 19 are not used.
Signal direction
RTS [Transmission request reception OK]
TXD [Transmission data]
RXD [Reception data]
CTS [Transmission enable Ready]
DTR [Transmission request reception OK]
Host Computer
DR series
3
2
5
4
20
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