Cecomp Electronics, APD 4002, RTD or Thermistor Input to DC Isolated Transmitter, 85-265 VAC, 60-300 VDC PowerFeatures:For All Common RTDs and ThermistorsZero and Span for OutputFull 1200 V IsolationInput LoopTracker® LEDOutput Test FunctionBuilt-In Loop Power Supply for Sink/Source OutputApplications:Convert/Isolate Temperature Sensors for PLC Input, Control and/or ValidationInterface Temperature Sensors with Panel Meters, PLCs, Recorders, Data Acq., DCS, & SCADA SystemsThe APD 4002 accepts an RTD or thermistor temperature input and provides an optically isolated and linearized DC voltage or current output.The sensor type, temperature range and output range are factory set. A custom RTD or thermistor can be set up with customer provided sensor data.Microprocessor-based linearization uses 41 to 55 segments or up to a 14th order polynomial depending on the sensor type. The input is sampled, digitally converted to a linearized temperature signal and then passed through an optocoupler to the output stage.Full 3-way isolation (input, output, power) make this module useful for ground loop elimination, common mode signal rejection, and noise pickup reduction.The low noise 18 bit analog output is isolated and can be set for common voltage and milliamp output types.Output Sink/Source VersatilityStandard on the APD 4002 is a 20 VDC loop excitation supply for the milliamp output. The output can be selectively wired for sinking or sourcing allowing use with a powered or unpowered milliamp device.LoopTrackerAn API exclusive feature includes a green LoopTracker LED that varies in intensity with changes in the process input signal. It provides a quick visual picture of your process input at all times and can greatly aid in saving time during initial startup and troubleshooting.Output TestAn API exclusive feature includes an output test switch to provide a fixed output (independent of the input) when pressed. The output test greatly aids in saving time during initial startup and/or troubleshooting. The test output level is adjustable from 0 to 100% of the output span.