1756-OF6CI | Allen-Bradley ControlLogix 6-Channel Isolated Analog Current Output Module
1756-OF6CI | Allen-Bradley ControlLogix 6-Channel Isolated Analog Current Output Module
1756-OF6CI | Allen-Bradley ControlLogix 6-Channel Isolated Analog Current Output Module
    1756-OF6CI | Allen-Bradley ControlLogix 6-Channel Isolated Analog Current Output Module
1756-OF6CI | Allen-Bradley ControlLogix 6-Channel Isolated Analog Current Output Module

1756-OF6CI | Allen-Bradley ControlLogix 6-Channel Isolated Analog Current Output Module

Part #: 1756-OF6CI Manufactured by: Allen-Bradley
Regular price
$685.00
Sale price
$685.00
Regular price
4 in Stock
Condition: New – Open box
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Product Overview
Allen-Bradley 1756-OF6CI ControlLogix Isolated Analog Output Module, Current, 6 Points (20 Pin)
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Product Description P/N: 1756-OF6CI

Description / Specifications

Description

The Allen-Bradley 1756-OF6CI is a ControlLogix isolated analog output module that provides six individually isolated current-loop outputs for high-precision industrial control applications. The 1756-OF6CI delivers stable 0–20 mA current signals with 13-bit resolution, making it suitable for actuators, transmitters, and process control functions. Designed for modular ControlLogix systems, it requires a compatible removable terminal block for installation and integrates seamlessly into advanced automation architectures.

 

 

Technical Specifications  

Condition New/Never Used Surplus
Brand Allen-Bradley
Category Output Module
Part Number 1756-OF6CI
Subcategory Output Module
Series ControlLogix
Module Type Isolated analog current output module
Number of Outputs 6 isolated channels
Output Range 0–20 mA (up to 21.074 mA max)
Resolution 13-bit (2.7 μA increments)
Backplane Current (5 VDC) 250 mA
Backplane Current (24 VDC) 225–300 mA (depending on load)
Backplane Power 6.7 W (0–550 Ω loads), 8.5 W (551–1000 Ω loads)
Power Dissipation 5.5 W (0–550 Ω), 6.1 W (551–1000 Ω)
Isolation Voltage 250 V continuous, tested at 1350 V AC for 2 s
Short-Circuit Protection Limited to ≤21 mA
Overvoltage Protection 24 VDC
Settling Time <2 ms to 95% of final value
Module Scan Time 10 ms (integer), 25 ms (floating point)
Accuracy ±0.1% of 4–21 mA at 25 °C
Temperature Drift 60–100 ppm/°C (nominal/max)
Calibration Interval 6 months recommended
RTB Compatibility 1756-TBNH, 1756-TBSH
Enclosure Type None (module only)

 

 

Information About 1756-OF6CI

The 1756-OF6CI belongs to the ControlLogix analog output family and is engineered to supply isolated current outputs across six channels, ensuring dependable signal separation for sensitive control circuits. It supports integer and floating-point data formats and includes configurable features such as clamping, ramping, rate limiting, and initialization hold to improve process stability. The module offers a calibrated accuracy better than 0.1% at 25 °C, with fast settling times under 2 ms and scan times as low as 10 ms in integer mode. With built-in overvoltage and short-circuit protection, as well as isolation tested to 1350 V AC, the 1756-OF6CI is suitable for demanding applications requiring reliable and noise-resistant analog output performance.

Key Features

  • 6 Isolated Current Outputs: Individually isolated 0–20 mA channels for precise analog control.
  • 13-Bit Resolution: Provides fine signal granularity across a 21 mA output span.
  • Advanced Output Features: Includes ramping, clamping, alarms, and data echo functions.
  • Multiple Data Formats: Supports both integer and floating-point output handling.
  • Fast Response: Settling time under 2 ms and scan times as low as 10 ms depending on mode.
  • Integrated Protection: Offers short-circuit limiting, 24 VDC overvoltage protection, and isolation testing.
  • RTB Compatibility: Works with 1756-TBNH or 1756-TBSH removable terminal blocks (sold separately).
  • Industrial Durability: Suitable for demanding ControlLogix applications requiring high accuracy and channel isolation.

The 1756-OF6CI delivers the reliability and precision required for advanced analog current-loop control in ControlLogix automation systems.

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Frequently Asked Questions about 1756-OF6CI
Question: What is the 1756-OF6CI?
Date Update:06/06/2025
Answer:

The 1756-OF6CI is a 6-channel isolated analog output module for the Allen-Bradley ControlLogix system.

It’s designed to provide analog control signals (current) to field devices.

Key features:

  • 6 isolated current output channels
  • Output range: 0-20 mA or 4-20 mA
  • Resolution: 15 bits plus sign
  • Isolation: 250V DC isolation between outputs
Question: What type of wiring is used with the 1756-OF6CI?
Date Update:06/06/2025
Answer:

Output wiring:

  • Use shielded twisted-pair cables for better noise immunity.
  • Each channel has a dedicated OUT and RTN (return) terminal for connection to field devices.

Typical wiring steps:

  • Connect the OUT terminal of the module to the positive terminal of the field device.
  • Connect the RTN terminal to the negative terminal of the field device.
  • Ensure shields are connected to the recommended ground point.
Question: Where can I find the manual for the 1756-OF6CI?
Date Update:06/06/2025
Answer:

You can find the official manual and installation instructions in the Rockwell Automation Literature Library or Product Compatibility and Download Center (PCDC).

Question: How do I configure the module in Studio 5000/RSLogix 5000?
Date Update:06/06/2025
Answer:

In Studio 5000:

  • Add the module to your I/O configuration.
  • Set the output range (0-20 mA or 4-20 mA) per channel in the module properties.
  • Download the configuration to the ControlLogix processor.
Question: How do I troubleshoot output errors?
Date Update:06/06/2025
Answer:

Common issues:

  • Output not responding: Verify wiring and ensure the field device is powered.
  • Output error/fault: Check module diagnostics in Studio 5000.
  • Interference: Use shielded cables, separate analog from high-voltage wiring.
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-OF6CI is a ControlLogix isolated analog output module that provides six individually isolated current-loop outputs for high-precision industrial control applications. The 1756-OF6CI delivers stable 0–20 mA current signals with 13-bit resolution, making it suitable for actuators, transmitters, and process control functions. Designed for modular ControlLogix systems, it requires a compatible removable terminal block for installation and integrates seamlessly into advanced automation architectures.

 

 

Technical Specifications  

Condition New/Never Used Surplus
Brand Allen-Bradley
Category Output Module
Part Number 1756-OF6CI
Subcategory Output Module
Series ControlLogix
Module Type Isolated analog current output module
Number of Outputs 6 isolated channels
Output Range 0–20 mA (up to 21.074 mA max)
Resolution 13-bit (2.7 μA increments)
Backplane Current (5 VDC) 250 mA
Backplane Current (24 VDC) 225–300 mA (depending on load)
Backplane Power 6.7 W (0–550 Ω loads), 8.5 W (551–1000 Ω loads)
Power Dissipation 5.5 W (0–550 Ω), 6.1 W (551–1000 Ω)
Isolation Voltage 250 V continuous, tested at 1350 V AC for 2 s
Short-Circuit Protection Limited to ≤21 mA
Overvoltage Protection 24 VDC
Settling Time <2 ms to 95% of final value
Module Scan Time 10 ms (integer), 25 ms (floating point)
Accuracy ±0.1% of 4–21 mA at 25 °C
Temperature Drift 60–100 ppm/°C (nominal/max)
Calibration Interval 6 months recommended
RTB Compatibility 1756-TBNH, 1756-TBSH
Enclosure Type None (module only)

 

 

Information About 1756-OF6CI

The 1756-OF6CI belongs to the ControlLogix analog output family and is engineered to supply isolated current outputs across six channels, ensuring dependable signal separation for sensitive control circuits. It supports integer and floating-point data formats and includes configurable features such as clamping, ramping, rate limiting, and initialization hold to improve process stability. The module offers a calibrated accuracy better than 0.1% at 25 °C, with fast settling times under 2 ms and scan times as low as 10 ms in integer mode. With built-in overvoltage and short-circuit protection, as well as isolation tested to 1350 V AC, the 1756-OF6CI is suitable for demanding applications requiring reliable and noise-resistant analog output performance.

Key Features

  • 6 Isolated Current Outputs: Individually isolated 0–20 mA channels for precise analog control.
  • 13-Bit Resolution: Provides fine signal granularity across a 21 mA output span.
  • Advanced Output Features: Includes ramping, clamping, alarms, and data echo functions.
  • Multiple Data Formats: Supports both integer and floating-point output handling.
  • Fast Response: Settling time under 2 ms and scan times as low as 10 ms depending on mode.
  • Integrated Protection: Offers short-circuit limiting, 24 VDC overvoltage protection, and isolation testing.
  • RTB Compatibility: Works with 1756-TBNH or 1756-TBSH removable terminal blocks (sold separately).
  • Industrial Durability: Suitable for demanding ControlLogix applications requiring high accuracy and channel isolation.

The 1756-OF6CI delivers the reliability and precision required for advanced analog current-loop control in ControlLogix automation systems.

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