Types of inputs for Trend IQ151+

I am looking at some problems we are having with our Building Management system (which consists of a number of Trend IQ151+ outstsaions, its about 13 years old)

I have a presure measurement sensor which is meant to be maeasuring supply duct pressure (for a control loop with the supply fan...) it appears to be giving negetive readings to the trend controller (i.e. a negetive voltage on the i/p pin, and more negetive as pressure increases so the output scale is 0 to -10V) should the inputs give intelligable values for this?

Does anyone know (or have the manuals for) what the range of possible input values that is acceptable for the ISS 3 input boards?

I hope someone out there might be able to help!

I can be contacted either on this email, or will check the board,



Reply to
Eddie Brown
Loading thread data ...

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.