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Allen Bradley Bulletin 931 Signal Conditioners 931S-A2A2N-DC

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931S-A2A2N-DC

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The 931S-A2A2N-DC is an active isolator designed for 3-way signal conditioning. It effectively manages an input signal of 4-20 mA while providing a corresponding active output of the same range, ensuring reliable performance in various applications.

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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 931S-A2A2N-DC

ManufacturerAllen Bradley
Product TypeActive Isolator, 3-Way
Product LineBulletin 931 Signal Conditioners
Part Number931S-A2A2N-DC
Weight3.00 lbs (1.36 kg)
Input Signal Type4-20 mA (passive input)
Maximum Input Current25 mA
Maximum Input Voltage7 V
Output Signal Type4-20 mA (active output)
Load Impedance (Output)≤500 Ω
Accuracy±0.2% of final value
Step Response Time<30 ms
Cut-off Frequency (-3 dB)≥15 Hz
Temperature Coefficient≤250 ppm/K
Residual Ripple<20 mV
Rated Insulation Voltage300 V
Impulse Withstand Voltage4 kV
Isolation Voltage (Input to Output)1.2 kVeff / 1 s
Pollution Severity2
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The 931S-A2A2N-DC model from Allen Bradley operates as a 3-way active isolator specifically designed for signal conditioning tasks. This unit primarily accepts a passive input signal of 4-20 mA while simultaneously generating an active output signal over the same range. It is capable of handling a maximum input current of 25 mA and is limited to an input voltage of 7 volts. The output exhibits a load impedance that does not exceed 500 ohms, making it suitable for various connected devices.

Accuracy is a key factor in applications utilizing the 931S-A2A2N-DC, as it maintains a precision level within ±0.2% of the final output value. The device has a rapid step response time of less than 30 milliseconds, ensuring quick adaptation to input changes. It features a cut-off frequency of at least 15 Hz, which allows for effective signal management in diverse operational settings.

Furthermore, the unit exhibits a temperature coefficient of up to 250 ppm/K and ensures low residual ripple below 20 mV, enhancing overall performance reliability. The rated insulation voltage reaches 300 volts, while the impulse withstand voltage can withstand up to 4 kV, reinforcing durability against electrical transients. A notable isolation voltage of 1.2 kV effective for 1 second is maintained between the input and output, ensuring safe operation under various conditions. The product is rated for pollution severity level 2, indicating its ability to function in environments with moderate contaminants.