Configured for high current DC load switching in the SLC 500 control system, the Allen-Bradley 1746-OBP16 (1746-OBP16 High Current Sourcing DC Output Module) provides direct physical output execution through 16 source-type DC channels.

Model Configuration

The 1746-OBP16 is a digital output module designed for Allen-Bradley SLC 500 chassis systems. The module provides sixteen sourcing DC outputs with a 20.4 to 26.4 VDC supply range and supports higher current field device control compared with standard low-current output modules.

Hardware Specifications

SLC 500 Control Interface

The 1746-OBP16 communicates through the SLC 500 backplane bus and receives output commands from the controller output image table. The module converts processor logic states into DC switching signals for connected field devices.

The SLC 500 platform uses deterministic scan-based I/O processing. Output updates are synchronized with the controller scan sequence, allowing predictable timing for discrete actuator control.

Industrial Control Architecture

The Allen-Bradley SLC 500 system uses modular I/O expansion to scale digital control capacity. The 1746-OBP16 supports I/O density scaling by providing sixteen output points within a single chassis slot.

The module is configured through the processor hardware setup and application program. Firmware compatibility is managed by the installed SLC controller platform and software environment.

Ordering Information

• 1 x Allen-Bradley 1746-OBP16 High Current Sourcing DC Output Module
• Compatible with Allen-Bradley SLC 500 chassis systems
• Integrated 16-point sourcing DC output hardware included
• Terminal blocks and field wiring accessories are not included unless specified

Field Installation Guidelines

Module Installation

• Remove chassis power before installing or removing the module.
• Insert the module into an available SLC 500 chassis slot.
• Confirm module position matches the configured I/O address.

Field Wiring

• Connect DC loads according to sourcing output wiring requirements.
• Verify external power supply polarity before energizing outputs.
• Keep output wiring separated from sensitive analog signal cables.
• Confirm load current remains within the specified output ratings.

Frequently Asked Questions

• How many output points are available on the 1746-OBP16?

  The module provides 16 sourcing DC output channels for connection to external DC loads.

• What type of outputs does the 1746-OBP16 use?

  The module uses sourcing DC transistor outputs designed for switching DC field devices.

• What voltage range does this module support?

  The specified operating voltage range is 20.4 to 26.4 VDC for source output operation.

• What is the maximum module output current?

  The module supports a total output current rating of 6.4 A across the output channels.

• What is the backplane current requirement?

  The module requires 250 mA from the SLC 500 chassis backplane at 5 VDC.

• Can the 1746-OBP16 switch AC loads?

  No. The module is designed for DC sourcing outputs and is not an AC relay output module.

• Does the module require separate communication wiring?

  No. Output data communication is performed through the SLC 500 chassis backplane connection.

• Is hot-swapping supported for this module?

  The module should be installed or removed only with chassis power removed according to SLC 500 procedures.