red lion Astro Line Series, Instruction Manual

Page: 30 / 63

COMMUNICATIONS APPLICATION
Note: A Serial Converter Module
is available for interfacing an
RS232 device to Geminis.
PROCESS MONITORING SYSTEM
Five Gemini 5200s with 20 mA Current Loop Option, are used
to monitor the speed and draw of various rollers in a printing
facility. The units are located near the printing presses in the
production area of the building. The communications lines are
run to an Industrial computer located in the production offices.
[OTHER GEMINIS OR RLC PRODUCTS WITH 20 MA CURRENT LOOP
CAN BE CONNECTED IN THE SAME LOOP.]
The drawing below shows the Current Loop set-up. Each
Gemini 5200 is given an address and the Serial DIP switches
are set accordingly. A Baud Rate of 1200 is selected and set
in each of the Gemini 5200s. An application program is
written, which sends and retrieves data from the units using
the Change and Transmit Value commands.
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