4-20mA RTD signal conditioning allows industry standard RTDs to be directly connected to PLC 4-20mA inputs and industrial IO modules. The 4-20mA RTD connection is a standard format in industrial measurement and control systems. The 4-20mA signal allows the RTD measurement to be run much further than the resistive connection of the RTD itself. 4-20mA signals can be run directly for thousands of feet, when using the correct cable and power supply. Many PLC inputs either standardly or optionally can be configured for 4-20mA, and it is not unusual to find spare inputs in an installation
Simple PLC RTD temperature measurement The Robert Owen Inc. ROI-XMA 4-20mA sensor transmitter allows 4-20mA PLC inputs to be used for RTD temperature measurement. Robert Owen Inc. temperature transmitters offer temperature ranges as wide as -200 to 500 Deg C or as small as 0 to 32 Deg C, depending on the make and model. […]
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Example 4-20mA thermistor transmitter wiring diagram A Simple 4-20mA Transmitter Operation Description The 4-20mA transmitter can be looked at as a temperature controlled variable load. It is in series with the power supply and current measurement shunt resistance. The effect is similar to the transmitter acting like a potentiometer. One that will vary total load
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RTD 4-20mA temperature transmitters READ TEMPERATURE SENSORS WITH YOUR PLC Use spare PLC 4-20mA inputs for temperature sensor measurement, with ROI-XMA RTD transmitters. ROI-XMA RTD transmitters allow the simple measurement of industry standard series 100-ohm PT100 or 1000 (1K) ohm PT1000 RTD temperature sensors. Existing RTD temperature sensors can be connected to modern control systems.
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4-20mA SENSOR TRANSMITTERS READ SENSORS WITH YOUR PLC Use spare PLC 4-20mA inputs for sensor measurement, with ROI-XMA transmitters. ROI-XMA sensor transmitters allow the simple measurement of industry standard sensors. Existing sensors can be connected to modern control systems. Read Thermistors, RTDs, or Potentiometers with a PLC. ROI-XMA 4-20mA sensor transmitters are a simple way to
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