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Allen Bradley Signal Conditioners 931N-U221

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931N-U221

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The 931N-U221 by Allen Bradley is a versatile signal converter designed for various applications. This single-channel unit offers universal input and delivers analog output, making it adaptable for different sensor configurations.

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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-U221

ManufacturerAllen Bradley
Product TypeSignal Converter
Product LineSignal Conditioners
Part Number931N-U221
Weight1.00 lbs (0.45 kg)
UPC191326317962
ChannelSingle Channel
InputUniversal
OutputAnalog
Power Supply24 VDC
AccessoriesUSB Cable
Cable Resistance per Wire5 Ohms
Sensor Current0.2 mA
Sensor Error DetectionYes
Short Circuit Detection< 5 Ohms
Power Consumption0.48 to 0.8 W
Wire Size26 to 12 AWG
Protection ClassIP20
Galvanic Isolation3-Way Isolator
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The Allen Bradley 931N-U221 is a signal converter that excels in transforming universal inputs into analog outputs. This device is crafted as a single-channel converter, making it suitable for various sensor types. Powering the unit requires a 24 VDC supply, which is common in many industrial setups.

Included with the signal conditioner is a USB cable for easy connectivity. The wire size supported ranges from 26 to 12 AWG, accommodating different wiring needs. For optimal performance, the cable resistance per wire is maintained at 5 Ohms. The sensor current for operation is specified at 0.2 mA, which aids in minimizing impact on the connected sensors.

Safety features are integral to the 931N-U221, as it incorporates sensor error detection and short circuit detection capabilities, with short circuit thresholds valued at less than 5 Ohms. The power consumption of this unit varies between 0.48 to 0.8 watts, ensuring efficient operation.

In terms of design, this signal conditioner is rated at IP20, indicating suitable protection for use in environments with limited exposure to dust and moisture. It is outfitted with a 3-way isolator, providing galvanic isolation for enhanced safety and performance across multiple applications.