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Allen Bradley ControlLogix 1756-IF8IH

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1756-IF8IH

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The Allen Bradley 1756-IF8IH is an isolated analog input module designed for precise data acquisition. It features eight current input channels, accommodating a range from 0 to 20 mA or 4 to 20 mA. The module provides a high resolution of 16 to 21 bits and supports HART communications, ensuring robust performance in automated systems.

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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 1756-IF8IH

ManufacturerAllen Bradley
Product TypeIsolated Analog Input Module
Product LineControlLogix
Part Number1756-IF8IH
UPC887172321627
Weight0.50 lbs (0.23 kg)
Number of Inputs8 current inputs
Input Signal Range0 to 20 mA (0 to 20.58 mA) and 4 to 20 mA (3.42 to 20.58 mA)
Resolution16 to 21 bits
Isolation250 V DC continuous, reinforced (inputs to backplane)
Supported ProtocolHART communications
Input Voltage Range5 to 30 VDC
Data Format32-bit floating point
Input Overvoltage Protection28.8 V DC typical
Power Dissipation within Module4W
Inrush Current400 mA @ 5V and 450 mA @ 24V
Typical Module Scan Time15 to 488 ms (filter dependent)
Wire TypeCopper
Backplane Current Draw210 mA @ 5.1 V DC; 110 mA @ 24 V DC
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With part number 1756-IF8IH, the Isolated Analog Input Module from Allen Bradley's ControlLogix series enables advanced monitoring of analog signals. This module can process eight input channels, supporting signal ranges from 0 to 20 mA, including 0 to 20.58 mA, and also 4 to 20 mA, accommodating various sensor applications.

The module boasts a resolution that ranges between 16 to 21 bits, allowing for high-accuracy readings. It is designed with reinforced isolation rated at 250 V DC for continuous operation, ensuring protection from potential electrical interference. The 1756-IF8IH also supports HART communications for additional capabilities in data transmission and diagnostics.

In terms of input specifications, the module functions well with an input voltage range from 5 to 30 VDC. It utilizes a 32-bit floating-point data format for precision in data processing. Furthermore, it features overvoltage protection, rated at a typical value of 28.8 V DC, safeguarding the inputs against transients. Power dissipation within the module remains low at around 4 watts.

When powering the module, a typical inrush current of 400 mA is expected at 5V, and 450 mA at 24V. Regarding performance, the module scan time usually ranges from 15 to 488 milliseconds, depending on filter settings and configurations. It is compatible with copper wire connections, making it suitable for standard installation practices. Overall, the 1756-IF8IH module provides a reliable solution for integrating analog input capabilities into ControlLogix systems.

Revision Part #Also known as
1756-IF8IH Ser A1756-IF8IH/A, Series A, Rev A
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