Overview
The Allen-Bradley 1746-OB16 Series D is a DC discrete output module for the SLC 500 family of programmable logic controllers. This module features sixteen 24VDC output channels with an output voltage range of 10–50V. The module mounts directly into any available slot in a 1746 I/O chassis and integrates seamlessly with SLC 500 processors to control external devices and equipment across a wide range of manufacturing and automation environments.
Key Features
- Sixteen 24VDC output channels for energizing electrical devices and implementing manual and automatic control
- Electronic protection against current overload and short-circuit conditions using thermal cut-out principle, limiting current within milliseconds once temperature threshold is reached
- Load-dependent total signal delay time of 0.1 milliseconds for the on state and 1 millisecond for the off state
- Single-slot module design for flexible I/O expansion in local or distributed architectures
- Proven field reliability across decades of SLC 500 installations
Technical Specifications
The module includes 16 outputs with 24V DC and 16 points per common with operating voltage between 10–50V. Continuous current per module is 8.0A at 30°C and 4.0A at 60°C. In the on state, the module has a voltage loss of 1.2 Volts at 0.50 Amps, with a minimum load per point of 1 milliamp. The backplane current for the output module is 0.280A at 5V DC and 0.0A at 24V DC.
Typical Applications
- Machine control and automation equipment activation
- Solenoid and valve operation in process control systems
- Indicator lamp and alarm signaling circuits
- Discrete device switching in manufacturing environments
- Remote and distributed I/O control architectures
Compatibility & Replacements
Compatible With
- SLC 500 family processors (all fixed and modular types)
- Allen-Bradley 1746 I/O chassis
- 1746 backplane communication for local and distributed I/O
- RSLogix 500 programming and configuration software
Replaces / Drop-In Replacement For
- Equivalent SLC 500 output modules in legacy installations
- Verify specific compatibility with your system integrator before ordering
Works With
- RSLogix 500 development environment
- ControlNet communication for remote I/O
- DeviceNet adapter modules for distributed applications
- Allen-Bradley industrial communication networks
