A temperature transmitter allows industry standard temperature sensors to be directly connected to PLC 4.20mA inputs and industrial IO modules. The 4.20mA transmitter connection is a standard format in industrial measurement and control systems. The 4.20mA signal allows the temperature sensor measurement to be run much further than the direct connection of the temperature sensor 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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4-20mA Thermistor Transmitters The Robert Owen Inc. ROI-XMA 4-20mA sensor transmitter allows PLC Thermistor Measurement. With ROI-XMA; you can use 10K NTC thermistors with standard industrial PLC’s and industrial I/O. The ROI-XMA series of loop powered thermistor transmitters. They convert a thermistors temperature related resistance change. Into a standard 4-20mA instrumentation signal. The ROI-10KXMA series
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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
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