APD 4151 Universal RTD Temperature Transmitters

The APD 4151 accepts an RTD temperature input and provides an optically isolated and linearized DC voltage or current output. The RTD type, temperature range and output range are field configurable. The RTD type is set with switches and its range is configured using front buttons, a multimeter and an input simulator. This provides a versatile solution that works with all commonly available RTD sensors. 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 up for common voltage and milliamp output types.

• Covers all common RTD sensors
• Removable plugs
• Input LoopTracker LED
• Output test button
• Full I/O/power isolation
• Selectable output sink/source
• 20 V output loop power supply
• Universal power 85-265 VAC, 60-300 VDC
• D option for 9-30 VDC, 10-32 VAC power