Red Lion GEMINI 33 - Manual (Page 26)

COMMUNICATIONS APPLICATION
-24-
PROCESS MONITORING SYSTEM
Five Gemini 3300s 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 3300 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 3300s. An application program is
written, which sends and retrieves data from the units using
the Change and Transmit Value commands.
Note: A Serial Converter Module
is available for interfacing an
RS232 device to Geminis.