TECHNICAL SPECIFICATIONS
Connectors and Pinouts
350-8697 DGy Model 201 User Guide 137
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conductors. It is important to use wires from the same pair for each pair
of signals. The standard pairs are shown in Table A-2. Note that one
wire of the pair has a solid color. The other wire (of the pair) is white with
a stripe of the same color as the other wire (e.g., Orange and
White/Orange).
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RS-232 CONNECTOR The RS-232 port is configured according to the Electronic Industries
Association Standard RS-232-C published in August 1969. The DGy
201 can be explicitly controlled with ASCII Command Set instructions
sent via the RS-232 serial port from either a computer or an ASCII
terminal. Refer to Chapter 6, for details on all commands.
CONNECTOR TYPE AND PINOUTS
Physically, the RS-232 port is a 9-pin D-Sub female connector. The pins
for the RS-232 connector are numbered from top to bottom, right to left.
Looking at the connector, pin #1 is located in the upper right corner, and
pin #9 is in the lower left corner.
Figure A-3. 9-pin D-Sub RS-232 Female Connector
The 9-pin D-Sub connector has the following signals:
Tabl e A-3 . RS-232 Serial Connector Pinouts
Pin Circuit Description
1CD Carrier Detect
2TD Transmit Data
3RD Received Data
4(not connected)
5AB Signal Ground (common return)
6DSR Data Set Ready
7CTS Clear to Send
8RTS Request to Send
9(not connected)