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Cygnus 2 Operating Manual
2.3.2.5 RS-232C Communications
RS-232C serial communications is included in Cygnus 2 as standard equipment. It
can be used to remotely control or monitor Cygnus 2. An industry standard 9-pin
D-Sub connector is required for the host computer side connection. Depending on
the computer source, all connections may not be necessary. The length of the
cable is limited to fifty feet according to published standards. Cygnus 2 interface
operates as DCE (Data Communication Equipment). Pin assignments are for
Cygnus 2 connector.
Table 2-4 RS-232C pin connections
Signal Name Pin EIA Name
TX Transmit Data 2 BA
RX Receive Data 3 BB
SG Signal Ground 5 AB
GND Shield Ground 1