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Allen Bradley Signal Conditioners 931N-R221

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931N-R221

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The 931N-R221 from Allen Bradley acts as an RTD signal converter within the Signal Conditioners series. This device enables precise analog output from RTD sensor inputs while supporting 2, 3, or 4 wire configurations for versatile wiring options.

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Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All of our products come with DO Supply's 2-year warranty.
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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 931N-R221

ManufacturerAllen Bradley
Product TypeRTD Signal Converter
Product LineSignal Conditioners
Part Number931N-R221
Weight0.50 lbs (0.23 kg)
UPC191326317948
Output Selection MethodDIP switch
Input Signal TypeRTD (Pt100)
Rated Supply Voltage24 VDC
Output Signal TypeAnalog current/voltage
RTD Wiring2/3/4 wires
Channel ConfigurationSingle-channel
Galvanic Isolation3-way isolation
Current Output Range0–20 mA
Input Channels1 channel
Mounting StyleDIN rail compatible
Noise ImmunityHigh (isolated I/O)
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The Allen Bradley 931N-R221 is a specialized RTD signal converter designed to convert the inputs from RTD sensors into an analog output. This particular model is tailored for the Pt100 input signal type, facilitating effective temperature measurement applications. The device allows flexibility in wiring, as it accommodates configurations using 2, 3, or 4 wires to accommodate different installation requirements.

The 931N-R221 operates on a supply voltage of 24 VDC, providing steady power for reliable operation. Users can select the output type via a DIP switch, enabling convenient adjustments to match specific application needs. This unit efficiently delivers an output signal as either current or voltage, supporting various analog signaling requirements.

Engineered for single-channel utilization, the converter is designed with high noise immunity, resulting in improved performance in conditions where signal interference may be prevalent. It features three-way galvanic isolation, ensuring that connected systems remain protected from electrical disturbances. This RTD signal converter is also DIN rail compatible, simplifying installation in various control systems, and enhances the overall robustness of measurements taken using RTD sensors.