Phonetics Sensaphone SCADA 3000, User Manual

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SCADA 3000 User’s Manual
• Segregate I/O wiring by signal type. Bundle wiring with similar electrical charac -
teristics together.
• Allow at least two inches between the module and I/O wiring ducts.
Terminal Blocks
The three terminal blocks on the Thermocouple Input Module are all removable for faster and
more convenient wiring of the I/O module. They should only be removed or attached when
power to the module is OFF. To remove the terminal blocks use your thumb or forefinger to
push the screw section of the terminal block straight out (see Figure 8).
Figure 8: Removing a terminal block
HOW THe THeRmOCOUPLe INPUT mODULe WORKS
The Thermocouple Input Module measures the signal produced by the connected thermo-
couples and transmits this data back to the SCADA 3000 CPU via the 4-wire communica-
tions bus. The SCADA 3000 CPU must be configured correctly in software, for the type of
thermocouple connected on each input. The temperatures measured from the thermocouples
can be used in the ladder program or C-program to perform control functions. You may even
choose to just monitor or datalog the temperature and activate alarms based on high and low
set-points.
Once the module is properly wired to the main unit and power is turned on to both devices,
the main unit will scan the module communications network to determine which modules are
connected. Next, default programming will be loaded into each module. When you go on-line
with the main unit, the thermocouple module icon will appear on the main unit form, indicat-
ing that a thermocouple module was found at the corresponding address.
PROGRAmmING THe THeRmOCOUPLe mODULe
To program the Thermocouple Input Module, click on the thermocouple icon on the Main
Unit form. The figure below shows the icon at address 1, which has the letters TH on it.
Figure 9: Main Unit form with Thermocouple
When you click the icon, the Thermocouple programming form will appear
(see figure below)
.
This form is similar to the other I/O programming screens. Although you can only measure
SCADA 3000 User’s Manual