1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
    1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
    1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
    1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts
1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts

1756-IF6I | Allen-Bradley ControlLogix Analog Input Module, Current/Voltage, 6 Pts

Part #: 1756-IF6I Manufactured by: Allen-Bradley
Regular price
$1,319.00
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$1,319.00
Regular price
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Condition: New-Surplus Original Box
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Product Overview
The Allen-Bradley 1756-IF6I provides six isolated analog input channels with flexible voltage and current ranges, advanced...  Read more
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Product Description P/N: 1756-IF6I

Description / Specifications

Description 

The Allen-Bradley 1756-IF6I is a ControlLogix analog input module with six individually isolated channels. It accepts voltage and current inputs across multiple ranges, offering 16-bit resolution for high-accuracy data acquisition.

 

 

Technical Specifications 

Brand Allen-Bradley
Manufacturer Rockwell Automation
Part Number/Catalog No. 1756-IF6I
Series ControlLogix
Module Type Analog Input
Inputs 6-Points, Isolated
Conversion Method Sigma-Delta
Data format Integer mode (left justified, 2 s complement) IEEE 32-bit floating point
Input signal Range ±10.5V, 0 -10.5V, 0-5.25V and 0-21 mA
Backplane Current (5Volts) 250 mA
Backplane Current (24Volts) 100 milliamps
Power Dissipation (Max) Voltage 3.7 W Current: 4.3 W
Removeable Terminal Blocks 1756-TBNH 1756-TBSH

  

 

Information About 1756-IF6I

The 1756-IF6I is part of the Allen-Bradley ControlLogix series, designed for precision analog signal monitoring in industrial automation systems. It supports six isolated channels configurable for ±10.5V, 0–10.5V, 0–5.25V, or 0–21 mA signals, with selectable resolution down to 0.34 µA/bit for current and 86 µV/bit for voltage ranges. The module employs a sigma-delta conversion method and allows data formatting in integer (left-justified, 2’s complement) or IEEE 32-bit floating-point formats. It integrates advanced features such as under/over-range detection, wire-off detection, rate alarms, and configurable process alarms. With real-time sampling (RTS) and requested packet interval (RPI) settings, it ensures timely and accurate data multicast to the ControlLogix system. The 1756-IF6I requires a 1756-TBNH or 1756-TBSH removable terminal block (RTB) for wiring and draws 250 mA at 5V DC and 100 mA at 24V DC, dissipating up to 4.3 W. Designed with digital and notch filtering, it improves signal accuracy by minimizing transient and noise interference, making it well-suited for demanding analog measurement applications.

Key Features:

  • Input capacity: Six individually isolated analog inputs configurable for voltage or current signals.
  • Signal ranges: Supports ±10.5V, 0–10.5V, 0–5.25V, and 0–21 mA inputs for flexible integration.
  • Resolution: 16-bit resolution with precision down to 86 µV/bit for voltage and 0.34 µA/bit for current.
  • Conversion: Sigma-delta conversion method for stable and accurate signal processing.
  • Data format: Supports integer (2’s complement) and IEEE 32-bit floating-point modes.
  • Diagnostics: Includes under/over-range detection, wire-off detection, rate alarms, and process alarms.
  • Filtering: Features notch and digital filters to minimize input noise and stabilize measurements.
  • Sampling: Real-time sampling (RTS) and requested packet interval (RPI) settings optimize data flow.
  • Wiring: Requires 1756-TBNH or 1756-TBSH removable terminal block for field connections.
  • Power draw: Consumes 250 mA at 5V DC and 100 mA at 24V DC, with max 4.3 W dissipation.

The 1756-IF6I delivers the reliability and precision required for high-performance analog signal acquisition in ControlLogix automation systems.

 

 

Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Frequently Asked Questions about 1756-IF6I
Question: What is Allen-Bradley 1756-IF6I?
Date Update:26/05/2025
Answer:

The 1756-IF6I is a 6-channel, individually isolated analog input module designed for ControlLogix systems by Rockwell Automation. It supports current and voltage input ranges such as ±10.5V, 0–10.5V, 0–5.25V, and 0–21 mA. Each channel has high-resolution 16-bit conversion using a Sigma-Delta method. It is well-suited for precision applications requiring noise filtering, signal diagnostics, and advanced scaling.

Question: How is real-time sampling (RTS) used in the module?
Date Update:26/05/2025
Answer:

The 1756-IF6I supports Real-Time Sampling (RTS) and Requested Packet Interval (RPI). These parameters define how often input data is sampled and sent to the controller. Consistent RTS ensures stable data capture, which is critical for applications such as fast PID control. Proper tuning of these intervals improves control system responsiveness.

Question: Why does the 1756-IF6I clamp the analog signal at 17 mA during a 4–20 mA test?
Date Update:26/05/2025
Answer:

This issue likely stems from improper return wiring in isolated mode. Since each channel on the 1756-IF6I is electrically isolated, each input must have its own complete signal path — including a separate RTN (Return) connection. If returns are floating or incorrectly shared, the input may clamp early or read unstable values. You can try bonding all RTN terminals if your system supports a common ground, but ideally, each transmitter should be wired with its own return path. Always consult Rockwell documentation before altering isolation behavior.

Question: What are the module dimensions and how is it mounted?
Date Update:26/05/2025
Answer:

The 1756-IF6I has a standard ControlLogix form factor, measuring approximately 35 mm (W) × 145 mm (H) × 135 mm (D). It mounts directly into a 1756 chassis backplane, using rail guides and a secure locking mechanism. No tools are required for module installation. Proper ventilation is required to avoid thermal derating.

Question: Is the Allen-Bradley 1756-IF6I still in production?
Date Update:26/05/2025
Answer:

No, the Allen-Bradley 1756-IF6I has been discontinued by Rockwell Automation as of March 31, 2017. It is no longer available for sale and has been officially removed from the product catalog. Rockwell recommends reviewing system designs and replacing the module with a functional replacement available within the ControlLogix platform. Always refer to Rockwell's official lifecycle documents or consult a distributor for the most suitable alternative.

IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 1756-IF6I is a ControlLogix analog input module with six individually isolated channels. It accepts voltage and current inputs across multiple ranges, offering 16-bit resolution for high-accuracy data acquisition.

 

 

Technical Specifications 

Brand Allen-Bradley
Manufacturer Rockwell Automation
Part Number/Catalog No. 1756-IF6I
Series ControlLogix
Module Type Analog Input
Inputs 6-Points, Isolated
Conversion Method Sigma-Delta
Data format Integer mode (left justified, 2 s complement) IEEE 32-bit floating point
Input signal Range ±10.5V, 0 -10.5V, 0-5.25V and 0-21 mA
Backplane Current (5Volts) 250 mA
Backplane Current (24Volts) 100 milliamps
Power Dissipation (Max) Voltage 3.7 W Current: 4.3 W
Removeable Terminal Blocks 1756-TBNH 1756-TBSH

  

 

Information About 1756-IF6I

The 1756-IF6I is part of the Allen-Bradley ControlLogix series, designed for precision analog signal monitoring in industrial automation systems. It supports six isolated channels configurable for ±10.5V, 0–10.5V, 0–5.25V, or 0–21 mA signals, with selectable resolution down to 0.34 µA/bit for current and 86 µV/bit for voltage ranges. The module employs a sigma-delta conversion method and allows data formatting in integer (left-justified, 2’s complement) or IEEE 32-bit floating-point formats. It integrates advanced features such as under/over-range detection, wire-off detection, rate alarms, and configurable process alarms. With real-time sampling (RTS) and requested packet interval (RPI) settings, it ensures timely and accurate data multicast to the ControlLogix system. The 1756-IF6I requires a 1756-TBNH or 1756-TBSH removable terminal block (RTB) for wiring and draws 250 mA at 5V DC and 100 mA at 24V DC, dissipating up to 4.3 W. Designed with digital and notch filtering, it improves signal accuracy by minimizing transient and noise interference, making it well-suited for demanding analog measurement applications.

Key Features:

  • Input capacity: Six individually isolated analog inputs configurable for voltage or current signals.
  • Signal ranges: Supports ±10.5V, 0–10.5V, 0–5.25V, and 0–21 mA inputs for flexible integration.
  • Resolution: 16-bit resolution with precision down to 86 µV/bit for voltage and 0.34 µA/bit for current.
  • Conversion: Sigma-delta conversion method for stable and accurate signal processing.
  • Data format: Supports integer (2’s complement) and IEEE 32-bit floating-point modes.
  • Diagnostics: Includes under/over-range detection, wire-off detection, rate alarms, and process alarms.
  • Filtering: Features notch and digital filters to minimize input noise and stabilize measurements.
  • Sampling: Real-time sampling (RTS) and requested packet interval (RPI) settings optimize data flow.
  • Wiring: Requires 1756-TBNH or 1756-TBSH removable terminal block for field connections.
  • Power draw: Consumes 250 mA at 5V DC and 100 mA at 24V DC, with max 4.3 W dissipation.

The 1756-IF6I delivers the reliability and precision required for high-performance analog signal acquisition in ControlLogix automation systems.

 

 

Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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