Cecomp Electronics, APD 4131 D, Thermocouple to DC Isolated Transmitter, High Accuracy, 9-30 VDC, 10-32 VAC PowerFeatures:High Accuracy LinearityEasy Setup-No Computer or Software NeededZero and Span Output Calibration ButtonsFull 1200 V IsolationInput LoopTracker® LED, Output Test FunctionBuilt-In Loop Power Supply for Sink/Source OutputApplications:Convert/Isolate Thermocouples for PLC Input, Control and/or ValidationInterface Thermocouples with Panel Meters, PLCs, Recorders, Data Acq., DCS, & SCADA SystemsThe APD 4131 D accepts a thermocouple temperature input and provides an optically isolated and linearized DC voltage or current output.The thermocouple type, temperature range and output range are factory set.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 is factory set for common voltage and milliamp output types.Output Sink/Source VersatilityStandard on the APD 4131 D 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.