4222, Universal I/f converterFeatures:Input for RTD, TC, Ohm, potentiometer, mA and VFrequency output NPN, PNP and TTLGenerates frequencies from 0.001...25000 Hz2-wire supply > 16 VUniversal AC or DC supplyProgrammable via detachable display front (4501 sold separatly), process calibration, signal simulation, password protection, error diagnostics and selection of help text in several languages.Technical characteristics:When 4222 is used in combination with the 4501 display / programming front, all operational parameters can be modified to suit any application. As the 4222 is designed with electronic hardware switches, it is not necessary to open the device for setting of DIP switches.A green front LED indicates normal operation.Continuous check of vital stored data for safety reasons.3-port 2.3 kVAC galvanic isolation.Application:Linearized, electronic temperature measurement with RTD or TC sensor.Conversion of linear resistance variation to a frequency signal, e.g. from solenoids and butterfly valves or linear movements with attached potentiometer.Power supply and signal isolator for 2-wire transmitters.Process control by way of a frequency signal transmitted to e.g. a PLC or a process computer.Galvanic separation and conversion of analog signals to frequency signals.Mounting / installation / programmingVery low power consumption means units can be mounted side by side without an air gap – even at 60°C ambient temperature.Configuration, monitoring, 2-point process calibration and more are accomplished using either the 4501 detachable display or the 4511 detachable digital communication enabler.All programming can be password-protected.NOTE: To program the item 4222 you'll need the p/n 4501 (sold separartly).