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Allen-Bradley 1756-IF8I

Allen-Bradley 1756-If8I Plc

Allen-Bradley 1756-IF8I

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All products (new, refurbished, and repairs) are covered by the Industrial Automation Company's 2 Year Warranty. Manufacturer's Warranty does not apply.

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  • 1756IF8I
  • 36 PIN

All products (new, refurbished, and repairs) are covered by the Industrial Automation Company's 2 Year Warranty. Manufacturer's Warranty does not apply.

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All products are covered by Industrial Automation Co.'s 2-Year Warranty.

Condition SKU Price Warranty Availability Quantity Purchase
Surplus Original Box 1756-IF8I-FS $2,475.00 USD 2 Year Extended Warranty 4 In Stock in US!
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Send in your item for a free evaluation and repair quote. Use our RMA form or email a repair request to service@iac.us.com , and we will contact you to assess your situation and offer shipping information.

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Understanding the Allen-Bradley 1756-IF8I

The Allen-Bradley 1756-IF8I ControlLogix analog input module features eight independent analog input channels. It has under-range/over-range detection capabilities and can alert the maintenance staff or process operator that a channel-specific outside the nominal value has been received. With a 24-bit conversion resolution and compatibility with 2- or 4-wire transmitter setups, this device offers better levels of precision.

allen bradley 1756-IF8I

Key Features and Benefits

This Allen-Bradley Controllogix 8-point analog input module contains a PLC, which constantly assesses the status of input devices and decides how to regulate the status of output devices by a specific program. Other features and benefits include:

  • An analog-to-digital converter
  • Overvoltage protection
  • Data warnings
  • Process alerts
  • Short circuit detection

Technical Specifications

With our Allen-Bradley 1761-NET-ENI replacement products, you can connect old controllers to modern Ethernet networks without having to invest in the costly engineering development or shutdowns required when replacing connected devices. Technical specifications include:The AB 1756-IF8I ControlLogix module's synchronized sampling capability allows input sampling to be synchronized among inputs on different modules. Technical specifications include:

  • Input signal range: -10…10V 0…10V 0…5V 0…20 mA
  • Current: 45 mA
  • I-O ranges: 0-10 volts
  • Current draw: 5.1 volts — 200 milliamps; 24 volts — 150 or 400 milliamps
  • Enclosure: Open


Because of its 24-bit conversion resolution, the Allen-Bradley 1756-IF8I is ideal for applications that require exceedingly precise measurements. With terminated analog signals that allow interfacing with actual process variables, the embedded PLC enables integration with computer-based control systems, like:

  • Human-machine interfaces (HMI)
  • Distributed control systems (DCS)
  • Supervisory control and data acquisition (SCADA)

Installation and Configuration

Before it can be connected to input signals, the AB 1756-IF8I requires a 36-pin RTB. Whether it's a remote I/O, distributed, or local installation, this device can be mounted to any ControlLogix chassis. Removable terminal blocks 1756-TBCH and 1756-TBS6H are necessary for signal wiring.

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Purchase the Allen-Bradley 1756-IF8I From Industrial Automation Co.

Industrial Automation Co. is the acknowledged source for the Allen-Bradley 1756-IF8I, as well as the 1756-L61 and 1756-L71S. We're known for our fast turnaround times and customer service that can't be beaten. You can rely on us as your partner for all your industrial replacement part needs. Request a quote today and experience the Industrial Automation difference.

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ManufacturerIndustrial Automation
Part Number/Catalog No.1756-IF8I
Channels8 Isolated Channels
Module TypeAnalog Input
I-O Ranges0-10 Volts
Inputs8-Points, Isolated , Any combination of Voltage or Current mode
Conversion MethodSigma-Delta
Current Draw (5.1 Volts)200 milliamps
Data formatIEEE 32-bit floating point
Current Draw (24 Volts)150 or 400 milliamps
Input signal Range-10…10V0…10V0…5V0…20 mA
Input Resolution24 bits; ±10.5V (1.49 ?V/count)0…10.5V (1.49 ?V/count)0…5.25V (1.49 ?V/count)0…21 mA (2.99 nA/count)
Resolution16-21 bits
Resolution16-21 bits
Backplane Current (5Volts)200 mA
RSLogix 5000 SoftwareVerson 8.02.00 or later
Backplane Current (24Volts)Voltage/Non-sourcing Current mode: 150 mA Sourcing Current mode: 400 mA (In Sourcing Current mode, the channel provides loop power.)
Power Dissipation (Max)Voltage mode: 4.6 W Non-sourcing Current mode: 5.1 W Sourcing Current mode: 7.3 W
Removeable Terminal Blocks1756-TBNH, 1756-TBS6H
Programming SoftwareRSLogix 5000; Studio 5000 Logix Designer