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• A-B 1756-OB8 ControlLogix Digital Output Module

  Product Overview

  The Allen-Bradley 1756-OB8 is an 8-point DC digital output module designed for the ControlLogix programmable automation system. It switches compatible DC field devices, such as relays, solenoids, and indicator lights, in response to controller commands. The module supports 12/24V DC source outputs and installs in a compatible ControlLogix chassis.

  

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  Key Technical Specifications

  Parameter	Specification
  Brand	Allen-Bradley (A-B)
  Model	1756-OB8
  Product Family	ControlLogix
  Product Type	Digital DC Output Module
  Number of Outputs	8 points
  Output Type	DC source
  Voltage Category	12/24V DC
  Operating Voltage Range	10–30V DC
  Maximum Current per Point	2 A
  Maximum Module Current	8 A
  Output Delay (Off to On)	1 ms maximum
  Output Delay (On to Off)	2 ms maximum
  Backplane Current Draw	165 mA at 5.1V DC; 2 mA at 24V DC
  Maximum Power Dissipation	2.5 W
  Removable Terminal Block	1756-TBNH or 1756-TBSH
  Mounting	ControlLogix chassis, one slot
  Lifecycle Status	Active

  

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  Features & Advantages

  • 8 digital output channels: Controls multiple DC field devices.

  • Wide DC operating range: Supports compatible 12V and 24V DC applications.

  • Fast switching response: Provides rapid output state changes.

  • Status indicators: Helps technicians monitor output operation.

  • ControlLogix integration: Designed for chassis-based PLC automation systems.

  Typical Applications

  • Industrial machine control

  • PLC-controlled relays and solenoids

  • Indicator lights and signaling devices

  • Manufacturing and production lines

  • General-purpose industrial automation

  Important Notes

  • This is a digital output module, not a digital input module.

  • The module uses DC source outputs and is not intended for directly switching AC loads.

  • The removable terminal block may be sold separately; confirm included accessories before ordering.

  • The 1756-OB8 outputs are grouped four points per common. Confirm wiring and load requirements before installation.

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