Red Lion GEMINI 42 User Manual
Page 37
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PROCESS MONITORING SYSTEM
Five Geminis with 20 mA Current Loop Option, are used to
monitor and control parts packaging machines in a plant. The
units are located at each of the machines 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 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 Geminis. An application program is written, which sends
and retrieves data from the units using the Change and
Transmit Value commands.
NOTE: The Gemini DC out (terminals 4 & 5)
could be used in place of the external 12
VDC supply.
COMMUNICATIONS APPLICATION