Download SR-430

6.Connection to Computer
(4) Communication control method
This device has the following two unreceivable states. In these states, set the communication timing
by the host computer.
1.
Due to half-duplex communication, data reception is disabled while the device is sending data.
2.
Data reception is disabled while the device is executing a command or the internal communication buffer is full.
The device notifies this state using an RS signal.
(5) Control line level
CS: The device sends data when this signal is at the high level.
RS: The device outputs low-level RSs in the unreceivable state.
DR: The device outputs high-level DRs while the power is turned on.
Signal level
High: +3V to +12V
Low: -3V to -12V
The following signals are only available to use RS-232C connection.
(6) Signal name and pin connection
External computer
This device
Signal
(GND)
(Data to send)
(Data to receive)
(Request to Send)
(Clear to Send)
(Data set Ready)
(Signal GND)
Signal direction
Signal
Pin
Pin
Signal
FG
SD
RD
RS
CS
DR
GND
1
2
3
4
5
6
7
1
2
3
4
5
6
7
FG
RD
SD
CS
RS
DR
GND
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