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3.0 CONFIGURATION
The Model 590A/591A is equipped with two eight-position DIP switches
that allow configuration to a wide range of applications. This section
describes all possible configuration settings, including the factory default
settings.
3.1 CHECKING THE DEFAULT CONFIGURATION
The Model 590A/591A passes four optically isolated signals between the
connected RS-232 DCE and DTE devices. The data signals, TD (pin 2),
and RD (pin 3), have been dedicated and cannot be changed. Use two
sets of DIP switches to set the control.
Data Signals: Transmit Data (TD) and Receive Data (RD):
The Transmit Data and Receive Data signals cannot be be altered. The
diagram below shows the TD and RD signal directions.
Control Signals*: DTR/RTS, and CD/DSR/CTS
The Model 590A/591A passes
one
control signal in each direction. There
it allows you to use it in applications that require hardware flow control.
You may select either DTR or RTS in one direction, and CD, DSR or CTS
in the other direction.
DCE Side
DTE Side
TD (2)
(2) TD
RD (3)
(3) RD