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 Problem: We need to use the output from one temprature transmitter from a single loop controller to control twovalves… one for the heating system and one for the cooling system.
Solution: Use two SIY PC- Programmable Signal Isolator Convertersin conjuntion with our IPH I/P transmitters to control the valves. One SIY input is configured for 12-4 mA (reversed) and the other for 12-20mA. At 12mA the setpoint is satisfied and both valves are closed.
Model example:
SIY/ PRG/ 4-20MA/ 10-42 DC [DIN] IPH/4-20MA/ 3-27 PSIG/ 35 PSI/- FR1 [WDNA] |
