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Allen Bradley Flex I/O 1794 1794sc-IF8IU

Product image is representative; revision or series may vary. Contact us to request a specific version.

1794sc-IF8IU

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The Allen Bradley 1794sc-IF8IU serves as an isolated universal input module tailored for Flex I/O systems. This unit accommodates various input signals, handling both voltage and current inputs with notable precision.

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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 1794sc-IF8IU

ManufacturerAllen Bradley
Product TypeIsolated Universal Input Module
Product LineFlex I/O 1794
Part Number1794sc-IF8IU
Weight2.00 lbs (0.91 kg)
Number of Inputs8 Channels
Nominal Input Voltage Range±50 mV, ±100 mV, 0-5 V, 1-5 V, 0-10 V, and ±10 V
Nominal Input Current Ranges0-20 mA, 4-20 mA
Resolution16 Bits
Input Impedance>1 M Ω for voltage, thermocouple, RTD and resistance inputs; 249 Ω ±1% for current inputs
Common Mode Rejection60 dB at 5 V peak-to-peak
Min. Frequency50 Hz
Max. Frequency60 Hz
Flexbus Current80 mA
Power Dissipation7.25 W @ 31.2 VDC
Thermal DissipationMax 10.2 BTU/Hr at 31.2 VDC

The 1794sc-IF8IU module from Allen Bradley is an advanced isolated universal input device designed to integrate seamlessly into Flex I/O series systems. With the capacity for 8 input channels, this module is engineered to accept diverse input voltage levels, including ranges of ±50 mV, ±100 mV, 0-5 V, 1-5 V, 0-10 V, and ±10 V. It is equally capable of processing input currents from 0-20 mA and 4-20 mA, ensuring adaptability for various industrial applications.

This module features a resolution of 16 bits, enhancing the capability to accurately sample and convert signals. The input impedance is rated at over 1 MΩ for voltage-related inputs such as thermocouples, resistance, and RTDs, ensuring that signal integrity is maintained. Current inputs are specified at 249 Ω ±1%, allowing for precise measurements in a range of configurations.

For effective operation, the device achieves a common mode rejection ratio of 60 dB when measuring a peak-to-peak voltage of 5 V, which helps mitigate unwanted noise and interference. The module supports an operational frequency bracket, accepting signals within the range of 50 Hz to 60 Hz.

At a flexbus current of 80 mA, this module dissipates a power level of 7.25 W when operating at 31.2 VDC, producing a maximum thermal dissipation of 10.2 BTU/hour at the same voltage level. Overall, the 1794sc-IF8IU module stands out for its versatility and ability to handle a wide array of input specifications, making it valuable for modern automation and control tasks.

Revision Part #Also known as
1794sc-IF8IU Ser A1794sc-IF8IU/A, Series A, Rev A
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