5.3.2 RS-232C Input and Output
5.3.2.1 RS-232C No. 1
The RS-232C No. 1 interface is used storing and reading measured data or part
programs on a personal computer.
1) Specifications
• Communication specification: Half-duplex
• Communication method: Asynchronous
• Communication speed: 1200, 2400, 4800, or 9600 bps.
2) Pin arrangement of the connector
Connector: JES-9P-2A3A (9-pin, D-sub)
manufactured by Nihon Attyaku Tanshi Inc.
5
1
6
9
Fig. 5-1
The connection specifications for connecting the RS-232C No. 1 interface to data
terminal equipment (DTE), such as a personal computer are as follows:
Data terminal equipment (DTE),
such as personal computer Data processing unit “QM-Data”:
(PC/AT compatible) (Data terminal equipment (DTE))
Signal name Pin No. Pin No. Signal name Description
DCD 1 1 NC No connection
RxD 2 2 RxD Received data
TxD 3 3 TxD Transmit data
DTR 4 4 DTR Data terminal ready
SG 5 5 SG Signal ground
DSR 6 6 DSR Data set ready
RTS 7 7 RTS Request to send
CTS 8 8 CTS Clear to send
RI 9 9 NC No connection
Shield Shell Shell Shield Frame ground
9-pin, D-sub 9-pin, D-sub
Fig. 5-2
No. 99MCA081A
5-4
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