Addressing High-Current Output Challenges in SLC 500 Systems
In industrial automation, engineers often face the challenge of driving high-current DC loads reliably within legacy control architectures. The Allen-Bradley 1746-OBP16 is designed to solve this problem by providing sixteen sourcing outputs with robust current handling and integrated fault protection. This module helps maintain uptime in demanding applications where output failures can cause costly production delays.
Introducing the 1746-OBP16 Digital DC Output Module
The 1746-OBP16 is a digital DC output module from the Allen-Bradley SLC 500 series, manufactured by Rockwell Automation. It features sixteen channels in a sourcing configuration and is intended for high-current applications. The module occupies a single slot in an SLC 500 fixed or modular chassis, making it a straightforward upgrade or replacement for existing systems.
Technical Specifications and Key Parameters
The 1746-OBP16 delivers a voltage range of 20.4-26.4 Volts DC source, with each output capable of handling 1.5 or 1 amp depending on configuration. The total module current is 6.4 amps, and the backplane current draw at 5 Volts is 250 milliamps. Step response times are 60 milliseconds on and 2.5 milliseconds off, ensuring predictable switching behavior for most discrete control tasks.
Integrated fuse protection is provided, with compatible replacement fuses including Littelfuse #322010,10A or #332010,10A. The fuse kit part number is 1746-F8, which contains five fuses. When a channel fault occurs, the E-FEUSE LED illuminates, and the affected channel shuts down while others continue operating. System power must be cycled after correcting the fault to reset the module.
Application Scenarios and Use Cases
The 1746-OBP16 is well-suited for controlling solenoid valves, motor contactors, and indicator lights in manufacturing lines. In a packaging facility, it can manage multiple actuators simultaneously, reducing wiring complexity by consolidating outputs into a single module. Its high-current capability also makes it effective for driving larger relays in material handling systems.
Customer Case Scenario
Consider a bottling plant that experiences frequent output module failures due to inrush currents from solenoid banks. By replacing an older module with the 1746-OBP16, the plant gains integrated fuse protection and higher per-channel current capacity. This illustration shows how the module can reduce unplanned downtime and simplify maintenance procedures.
Compatibility and Integration
The 1746-OBP16 integrates seamlessly with SLC 500 fixed and modular chassis, using the backplane for power and communication. It is compatible with SLC 500 processors and can be configured using standard programming software. Recommended signal wires are a maximum of 2 mm sq (14 AWG) to ensure reliable connections.
Frequently Asked Questions About the 1746-OBP16
What is the output configuration of the 1746-OBP16?
The module provides sixteen sourcing DC outputs with a voltage range of 20.4-26.4 Volts DC. Each output can handle 1.5 or 1 amp, and the total module current is 6.4 amps.
How does the integrated fuse protection work?
The module includes an electronic fuse that protects each channel from short-circuit and overload. When a fault is detected, the affected channel shuts down, and the E-FEUSE LED illuminates. Other channels continue operating normally.
What replacement fuses are compatible with the 1746-OBP16?
Compatible fuses include Littelfuse #322010,10A or #332010,10A. The Allen-Bradley fuse kit part number is 1746-F8, which contains five fuses for easy replacement.
Can the 1746-OBP16 be used in a fixed SLC 500 system?
Yes, the module is compatible with both fixed and modular SLC 500 hardware. It occupies a single slot and connects via the backplane.
Company Strength and Supply Assurance
Petro Auto Tech specializes in providing industrial automation parts like the 1746-OBP16, backed by technical expertise and reliable sourcing. Customers can rely on Petro Auto Tech for genuine components and support for legacy SLC 500 systems. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.
