I have connected the ITP11 but it doesn’t switch on, what should I check?
First of all, check the polarity of the signal.
Also, make sure that the 4-20 mA signal is available. If the signal is too low (< 3.8 mA), there is not enough power to switch on the process display.
Check the wiring. A wire may be loose or not connected to the terminals.
Check the transmitter output. If the output is passive, you need an auxiliary voltage supply.