Allen Bradley 1756-OB32 | ControlLogix 32-Point 12/24 VDC Digital Output Module

Product Description

The Allen Bradley 1756-OB32 is a ControlLogix DC output module designed to provide 32 sourcing output points for industrial automation systems. It supports a wide operating voltage range and delivers reliable switching performance with fast response times. The module is engineered for high-density output applications, offering robust current handling and integrated diagnostics.

Technical Specifications

• Manufacturer Allen Bradley

• Product Line ControlLogix 1756 Series

• Product Type Digital Output Module

• Part Number 1756-OB32

• Weight 0.56 lbs (0.26 kg)

• Outputs 32 sourcing DC outputs

• Nominal Voltage 12–24 V DC

• Operating Voltage Range 10–31.2 V DC

• Output Delay Time

• OFF to ON: 60 µs nominal / 1 ms max

• ON to OFF: 200 µs nominal / 1 ms max

• Current per Point

• 0.5 A @ 50 °C (122 °F)

• 0.35 A @ 60 °C (140 °F)

• Current per Module

• 16 A @ 50 °C (122 °F)

• 10 A @ 60 °C (140 °F)

• Maximum Output Current Rating

• Point: 0.5 A @ 50 °C, 0.35 A @ 60 °C

• Module: 16 A @ 50 °C, 10 A @ 60 °C

• Power Dissipation (Max) 4.8 W @ 60 °C

• Backplane Current 300 mA @ 5 V DC

• Isolation Voltage 50 V continuous (basic insulation)

• Removable Terminal Blocks 1756-TBCH, 1756-TBS6H

• Enclosure Type Open-style

Application Scenarios

• High-density digital output control in ControlLogix systems

• Machine-level automation requiring fast switching response

• Distributed control systems with modular expansion

FAQ

Q: How many outputs does the 1756-OB32 provide?  A: It supports 32 sourcing DC output points.

Q: What is the maximum current per module?  A: 16 A at 50 °C, derated to 10 A at 60 °C.

Q: Which terminal blocks are compatible?  A: 1756-TBCH and 1756-TBS6H removable terminal blocks.

Comparable Models

• 1756-OB32: 32-point DC output module (this model)

• 1756-IB32: 32-point DC input module

• 1756-OB16: 16-point DC output module