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Description
The Model URA-RS232-C is a standard VGA-plus-Audio over Cat5 Receiver with the added
feature of having a programmable RS-232 serial device port for the control & automation of a
Projector, LCD, or any other device with serial port.
The URA-RS232-C has a discrete input that senses a dry contact closure (or Voltage Level). It
detects both “Low-To-High” and “High-To-Low” transitions of the ‘EXT CTRL’ input and issues
corresponding commands out the serial port of the URA-RS232-C to the serial device
(projector).
The commands can be any ASCII (or non-ASCII) data with programmable delays embedded
in the string. The commands can also be complex multi-part strings typical of many modern
projectors.
Hall Research provides a powerful Windows® based application (available on-line) that is used
to create the data files and upload it to the URA-RS232-C, via a supplied cable.
Features
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Compact, Reliable, and Economical
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2 user-programmable Command Strings
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Allows multiple instances of user-defined delays within each string
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Intuitive Operation
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Windows™ software for programming available on-line
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Made in USA
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Dual color front panel LED status indicator
Operation
The URA-RS232-C is designed to send a string of commands to a
serial device (projector) via the serial interface, when the discrete
input transitions. When the ‘EXT CTRL’ input transitions “High-To-
Low”, the dry contact is opened, the URA-RS232-C will send the
“OFF” string to the serial device (projector) and when the ‘EXT
CTRL’ input transitions “Low-To-High”, the dry contact is closed,
the URA-RS232-C will send the “ON” string to the serial device
(projector).
The URA-RS232-C will communicate with the serial device (projector) at some baud rate
specified in the user’s manual of the serial device (projector). The URA-RS232-C programming
software will allow the user to select that baud rate for the serial device (projector). The URA-
RS232-C programming software will also allow the user to upload two strings to the URA-
RS232-C. This will consist of the ON string and the OFF string. These strings are limited to 100
characters in length each. These two strings can be constructed directly in the URA-RS232-C
programming software. The user will then be able to upload the baud rate and the two strings
to the URA-RS232-C. The URA-RS232-C will, in turn, send out these strings to the serial
device (projector) when the ‘EXT CTRL’ input changes state.
The user also has the ability to include a number of waits in the string of commands. For
example the user may send out the commands ‘CCB’ and then wish to wait for 3 seconds and
then send out additional commands. This will be explained in further detail below.
