Cecomp Electronics, APD 4001, RTD to DC Isolated Transmitter, 85-265 VAC, 60-300 VDC PowerFeatures:Convert Temperature to DC OutputZero and Span for OutputFull 1200 V IsolationInput and Output LoopTracker® LEDsOutput Test ButtonBuilt-In Loop Power Supply for Sink/Source OutputApplications:Convert Output From RTD Sensor for PLC Input, Control and/or ValidationInterface an RTD with Panel Meters, PLCs, Recorders, Data Acq., DCS, & SCADA SystemsThe APD 4001 D accepts an RTD 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 and can be specified as required. This provides an economical solution when a temperature sensor signal must be converted to a DC signal.The temperature input is linearized and amplified, 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.Output Sink/Source VersatilityStandard on the APD 4001 D is a 20 VDC loop excitation supplies for the output. This power supply can be selectively wired for sinking or sourcing allowing use with any combination of powered or unpowered milliamp devices.LoopTrackerAPI exclusive features include LoopTracker LEDs (green for input, red for output) that vary in intensity with changes in the process input and output signals. They provide a quick visual picture of your process loop at all times and can greatly aid in saving time during initial startup and troubleshooting.Output TestAn API exclusive feature includes an output test button to provide a fixed output (independent of the input) when held depressed. The output test greatly aids in saving time during initial startup and/or troubleshooting. The test output level is potentiometer adjustable from 0 to 100% of the output span. Terminals are provided to operate the test function remotely. This also allows use as a remote manual override to provide a temporary fixed output if desired.