Example 1, Signal Conditioning with Isolation
As we all know, variable speed motor drives (VFDs) inherently generates spurious
electromagnetic interference (EMI) that can disrupt surrounding instrumentation
such as a Programmable Logic Controller (PLC) which may be supplying a 4/20 mADC
signal that is used by the VFD to control the motor speed.
For this application AGM would propose a product be placed between the PLC and VFD
that will optically isolate the PLC from VFD thus preventing the VFD generated EMI
from disrupting the PLC.
Example 2, Automatic Tank Level Control
Let's say that you have a water storage tank that is filled by turning on a
pump that pumps water from a ground water reservoir into the tank and you would
like the pump to be operated automatically so that the water level is maintained
within a desired range.
In this case, AGM would suggest a product that will monitor the storage tank
level from a level sensor and if that level drops to a settable turn-on point then
it will turn on the pump and if the level rises to settable turn-off point then
it will turn off the pump.
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