Configured for discrete DC load switching in the SLC 500 control platform, the Allen-Bradley 1746-OB16E (1746-OB16E Isolated Sourcing DC Output Module) provides direct physical electrical execution for 10 to 30 VDC field output circuits.

Model Identification

The 1746-OB16E is an SLC 500 series digital output module designed for sourcing DC output applications. The module provides isolated output channels for controlling DC field devices from an SLC 500 chassis.

Hardware Specifications

EtherNet/IP and PLC Control Integration

The 1746-OB16E operates as a local SLC 500 I/O module controlled through the SLC processor backplane communication system. The module exchanges output status data through the chassis bus and converts PLC logic commands into electrical switching signals.

The Allen-Bradley SLC platform uses deterministic backplane communication for I/O data transfer. Output density scaling depends on chassis configuration, processor capability, and installed module count. Firmware compatibility should be verified when integrating replacement modules into existing SLC control systems.

Ordering Information

• 1 x Allen-Bradley 1746-OB16E Isolated Sourcing DC Output Module
• Compatible installation requires an Allen-Bradley SLC 500 chassis and processor system
• Field wiring connectors and terminal accessories are installed according to the application requirements
• Programming and configuration are performed through the connected SLC 500 controller environment

Field Installation Guidelines

Mounting

• Install the module in an approved SLC 500 chassis slot.
• Confirm chassis power is removed before module insertion or removal.
• Verify module seating and locking tabs before energizing the system.

Wiring

• Use appropriate DC-rated field wiring for connected loads.
• Separate output wiring from high-voltage AC conductors to reduce electrical interference.
• Connect field power according to the module wiring specification.

Grounding

• Maintain proper panel grounding practices.
• Use shielded cable when required by the application environment.
• Avoid routing output wiring parallel to high-noise power cables.

Frequently Asked Questions

• Is the 1746-OB16E a relay output module?

  No. The 1746-OB16E is a solid-state sourcing DC output module designed for DC load switching applications.

• How many output channels are available on this module?

  The module provides 16 isolated sourcing DC output points for connection to external DC devices.

• What voltage range does the output support?

  The specified operating output range is 10 to 30 VDC for connected field devices.

• Can the module be installed in any PLC chassis?

  No. The module is designed specifically for Allen-Bradley SLC 500 chassis systems.

• Does the module support analog output signals?

  No. The 1746-OB16E provides discrete ON/OFF DC switching outputs only.

• Does the module require external field power?

  Yes. DC field power is required for operating connected output devices.

• Can this module be hot-swapped during operation?

  Module removal or installation should only be performed according to SLC 500 maintenance procedures with proper power isolation.

• What communication network does the module use?

  The module communicates through the SLC 500 chassis backplane rather than a direct Ethernet network connection.