1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
    1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
    1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
    1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)
1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)

1756-OB32 | Allen-Bradley ControlLogix 10-31VDC Output Module, 32 Points (36 Pin)

Part #: 1756-OB32 Manufactured by: Allen-Bradley
Regular price
$212.00
Sale price
$212.00
Regular price
6 in Stock
Condition: New – Open box
Shipping calculated at checkout.
Product Overview
Allen Bradley ControlLogix DC Output Module with 32-Point Outputs
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Product Description P/N: 1756-OB32

Description / Specifications

Description 

The Allen-Bradley 1756-OB32 is a ControlLogix digital output module designed for industrial automation systems. It provides 32 sourcing DC outputs, divided into two groups of 16 points, for controlling field devices. Operating within a voltage range of 10 to 31.2 VDC, this module is widely used in applications requiring reliable high-density output interfacing.

 

 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category Digital Output Modules
Part Number 1756-OB32
Subcategory 32-Point DC Output
Type Sourcing Digital Output Module
Sub-Brand ControlLogix
Number of Outputs 32 (two groups of 16)
Output Range 10…31.2 VDC
Output Type Sourcing
Rated Current per Output 0.35 A max
Rated Current per Module 10 A max
Isolation 250 V continuous between the two output groups
Module Status Indicators Output status, communication status, module health LEDs
Removable Terminal Block 1756-TBCH or 1756-TBS6H
Mounting ControlLogix chassis
Enclosure Open-style (IP20)
Operating Temperature 0…60 °C (32…140 °F)
Storage Temperature –40…85 °C
Relative Humidity 95% non-condensing
Vibration Rating 2 g (10–500 Hz)
Shock Rating Per IEC 60068-2-27
Standards IEC 60068-2 series, IEC 61000-4 series, EMI/EMC compliance
Certifications CE, CSA, KC, Marine, UL, ATEX
Application Machine control, DC device switching, high-density output systems
Special Features Output diagnostics, dual-group isolation

  

 

Information About 1756-OB32

The 1756-OB32 is part of the Allen-Bradley ControlLogix I/O family, developed to deliver flexible and scalable output control. It supports 32 DC sourcing outputs with groupings of 16 points per channel bank. Each output channel is rated for up to 0.5 A at 50 °C or 0.35 A at 60 °C, with a maximum module current of 16 A at 50 °C and 10 A at 60 °C. Compatible removable terminal blocks (RTBs) include the 1756-TBCH cage clamp and the 1756-TBS6H spring clamp, providing secure wiring options. The module supports various communication modes such as scheduled output data, rack optimization, and listen-only configurations. Output fault states can be configured per point, with options to hold last state, force ON, or force OFF in program or fault conditions. Protection can be implemented using 5x20 mm fuses (800 mA rating), such as Littelfuse SP001.1003 or Schurter 216.800. The module dissipates up to 4.8 W of power and maintains 50 V continuous isolation between field-side and backplane. Its backplane current draw is 300 mA at 5.1 VDC and 2 mA at 24 VDC.

Key Features:

  • Outputs: 32 DC sourcing outputs, grouped into 2 × 16-point banks.

  • Voltage Range: Operates from 10 to 31.2 VDC.

  • Output Current: 0.5 A per point at 50 °C, 0.35 A per point at 60 °C.

  • Module Current Capacity: 16 A maximum at 50 °C, 10 A maximum at 60 °C.

  • RTB Compatibility: Works with 1756-TBCH (cage clamp) and 1756-TBS6H (spring clamp).

  • Fault Handling: Configurable per-point states for fault and program conditions.

  • Protection: Fuse-compatible design with recommended 800 mA fuses.

  • Isolation: 50 V continuous isolation between backplane and outputs.

The 1756-OB32 delivers the density, flexibility, and reliability needed for high-performance digital output control in ControlLogix automation systems.

Frequently Asked Questions about 1756-OB32
Question: What is the purpose of the 1756-OB32 module?
Date Update:02/06/2025
Answer:

The 1756-OB32 is a high-density discrete DC output module used to control field output devices such as pilot lights, relays, solenoids, and alarms. It is commonly integrated in automation systems that require multiple outputs in a compact form. It operates on a 12/24V DC source and only supports sourcing output type.

Question: What are the physical dimensions of the 1756-OB32 module?
Date Update:02/06/2025
Answer:

The module is designed to fit into a single slot of a ControlLogix chassis. While the exact dimensions are not specified in the datasheet, standard ControlLogix modules typically measure approximately 5.5 x 1.4 x 5.7 inches (140 x 35 x 145 mm). It is compact enough to be used in high-density installations.

Question: Does the 1756-OB32 support diagnostic LEDs?
Date Update:02/06/2025
Answer:

Yes, each of the 32 channels on the 1756-OB32 has its own LED indicator. These LEDs provide real-time feedback on channel status and are useful for troubleshooting. The module also has status lights for the module itself.

Question: Can you configure the output state on fault or in program mode?
Date Update:02/06/2025
Answer:

Yes, the 1756-OB32 allows configuration of the output states in both Fault Mode and Program Mode. You can set each point to Hold Last State, turn On, or turn Off. These settings provide flexibility in maintaining safe machine states during transitions.

Question: Is the 1756-OB32 module still in production?
Date Update:02/06/2025
Answer:

Yes, the 1756-OB32 module is still being manufactured and supported by Rockwell Automation. It remains a current product in the ControlLogix family and is compatible with both older and modern ControlLogix processors. Its continued use in modern systems affirms its active production status.

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-OB32 is a ControlLogix digital output module designed for industrial automation systems. It provides 32 sourcing DC outputs, divided into two groups of 16 points, for controlling field devices. Operating within a voltage range of 10 to 31.2 VDC, this module is widely used in applications requiring reliable high-density output interfacing.

 

 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category Digital Output Modules
Part Number 1756-OB32
Subcategory 32-Point DC Output
Type Sourcing Digital Output Module
Sub-Brand ControlLogix
Number of Outputs 32 (two groups of 16)
Output Range 10…31.2 VDC
Output Type Sourcing
Rated Current per Output 0.35 A max
Rated Current per Module 10 A max
Isolation 250 V continuous between the two output groups
Module Status Indicators Output status, communication status, module health LEDs
Removable Terminal Block 1756-TBCH or 1756-TBS6H
Mounting ControlLogix chassis
Enclosure Open-style (IP20)
Operating Temperature 0…60 °C (32…140 °F)
Storage Temperature –40…85 °C
Relative Humidity 95% non-condensing
Vibration Rating 2 g (10–500 Hz)
Shock Rating Per IEC 60068-2-27
Standards IEC 60068-2 series, IEC 61000-4 series, EMI/EMC compliance
Certifications CE, CSA, KC, Marine, UL, ATEX
Application Machine control, DC device switching, high-density output systems
Special Features Output diagnostics, dual-group isolation

  

 

Information About 1756-OB32

The 1756-OB32 is part of the Allen-Bradley ControlLogix I/O family, developed to deliver flexible and scalable output control. It supports 32 DC sourcing outputs with groupings of 16 points per channel bank. Each output channel is rated for up to 0.5 A at 50 °C or 0.35 A at 60 °C, with a maximum module current of 16 A at 50 °C and 10 A at 60 °C. Compatible removable terminal blocks (RTBs) include the 1756-TBCH cage clamp and the 1756-TBS6H spring clamp, providing secure wiring options. The module supports various communication modes such as scheduled output data, rack optimization, and listen-only configurations. Output fault states can be configured per point, with options to hold last state, force ON, or force OFF in program or fault conditions. Protection can be implemented using 5x20 mm fuses (800 mA rating), such as Littelfuse SP001.1003 or Schurter 216.800. The module dissipates up to 4.8 W of power and maintains 50 V continuous isolation between field-side and backplane. Its backplane current draw is 300 mA at 5.1 VDC and 2 mA at 24 VDC.

Key Features:

  • Outputs: 32 DC sourcing outputs, grouped into 2 × 16-point banks.

  • Voltage Range: Operates from 10 to 31.2 VDC.

  • Output Current: 0.5 A per point at 50 °C, 0.35 A per point at 60 °C.

  • Module Current Capacity: 16 A maximum at 50 °C, 10 A maximum at 60 °C.

  • RTB Compatibility: Works with 1756-TBCH (cage clamp) and 1756-TBS6H (spring clamp).

  • Fault Handling: Configurable per-point states for fault and program conditions.

  • Protection: Fuse-compatible design with recommended 800 mA fuses.

  • Isolation: 50 V continuous isolation between backplane and outputs.

The 1756-OB32 delivers the density, flexibility, and reliability needed for high-performance digital output control in ControlLogix automation systems.

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