Configured for discrete logic execution in programmable controller architectures, the Allen-Bradley 1746-OB16, also cataloged as the 1746OB16 I/O Module, provides direct physical/electrical execution.

Nomenclature and Part Identification

• Platform Family: 1746 (SLC 500 modular I/O chassis format)
• Module Function: OB (DC digital sourcing output module)
• Channel Density: 16 (Sixteen discrete output points per common terminal)

Hardware Specifications

Deterministic Network and Backplane Bus Execution

Integrated into the backplane bus communication matrix, the module ensures deterministic signal exchanges across SLC 500 controller backplanes. I/O density scaling allows rapid state execution across all 16 discrete channels without introducing bus communication latency. Furthermore, firm hardware register mapping ensures immediate firmware flash compatibility with legacy processing units while maintaining stable backplane bus communication velocities.

Scope of Delivery Manifest

• 1 x Allen-Bradley 1746-OB16 Discrete Output Module
• 1 x Removable Terminal Block (RTB) Connector
• 1 x Hardware Installation Compliance Guide

Chassis Physical Mounting Guidelines

• Slot Positioning: Insert the module into any available I/O slot of a 1746 modular chassis, ensuring power is disconnected from the rack prior to insertion.
• Wiring Segregation: Route high-voltage AC lines away from low-voltage DC output wiring to prevent electromagnetic induction across terminal blocks.
• Terminal Torque: Secure all field wiring screw terminals firmly to prevent loose connections under high-vibration industrial environments.

Frequently Asked Questions

• What is the total number of discrete output channels provided by this module?

  The unit features 16 sourcing DC output points grouped together under a common terminal.

• What is the allowable operating voltage range for field loads?

  The module operates across a direct current voltage span from 10 VDC to 50 VDC.

• How much backplane current does the module draw at 5 VDC?

  The module consumes 0.28 A of current from the 5 VDC backplane power supply.

• Does this module provide built-in short-circuit protection?

  No, this standard electronic version does not include electronic short-circuit protection, which distinguishes it from the 1746-OB16E variant.

• What is the maximum off-state leakage current per output point?

  The off-state leakage current is restricted to a maximum limit of 1 mA.

• What is the minimum load current required to maintain proper switching behavior?

  The module requires a minimum load current of 1 mA per active channel.

• What switching response times can be expected during operation?

  Signal propagation delay is rated at 0.1 milliseconds for state turn-on and 1 ms for turn-off under resistive loads.

• What is the total thermal dissipation generated across all active points?

  Total thermal dissipation reaches 7.6 watts at maximum load conditions, averaging 0.388 watts per point.