Product Overview
As industrial automation evolved from relay-based systems to programmable logic controllers, the need for robust, high-current digital output modules became critical. The Allen-Bradley 1746-OB16E is a SLC 500 Digital DC Output Module designed to meet these demands. It provides 16 electronically-fused outputs with a voltage range of 10-30 Volts DC Source, making it suitable for driving solenoids, contactors, and indicator lights in demanding environments.
Technical Specifications Breakdown
Key parameters for the 1746-OB16E are listed below for quick reference:
| Feature | Specification |
|---|---|
| Module Type | Digital DC Output Module |
| Voltage Range | 10-30 Volts DC Source |
| Outputs | 16 |
| Current/Output | 1 or 0.5 amps |
| Current/Module | 8 amps |
| Backplane Current (5 Volts) | 135 milliamps |
| Current/Module (30 Celsius) | 9 amps |
| Applications | High Current |
| Step Response | 60 milliseconds in, 2.5 milliseconds out |
Industry Applications
This digital output module excels in high-current applications such as controlling motor starters, valve actuators, and large contactors. Its 16 outputs can handle up to 1 amp per output (or 0.5 amps depending on configuration), making it ideal for driving multiple loads simultaneously. The module's electronically-fused design protects against overcurrent conditions, reducing downtime in manufacturing lines.
Installation & Setup Guidance
When installing the 1746-OB16E, mount it in any available slot of a 1746 chassis. Use the Removable Terminal Block (RTB) for wiring connections. Ensure the DC supply voltage is within the 10-30 Volts DC Source range. Wire outputs according to your load requirements, respecting the current limits per output and per module. The backplane current draw is 135 milliamps at 5 Volts, so verify your chassis power budget.
Maintenance & Reliability
Regularly inspect the module for signs of overheating or loose connections. Operate within the specified temperature and humidity conditions to ensure long-term reliability. The module is NEMA ICS 2-230 rated for noise immunity, which helps maintain signal integrity in electrically noisy environments. No disassembly is required for routine maintenance.
Compatibility & Integration
The 1746-OB16E is part of the Allen-Bradley SLC 500 series and integrates seamlessly with other SLC 500 modules and processors. It uses the standard backplane interface for communication. The module supports high-current outputs, making it compatible with a wide range of industrial actuators and indicators.
Selection Guide & Purchasing Advice
When selecting the 1746-OB16E, consider your output current requirements and the number of loads. This module is ideal for applications needing 16 outputs with up to 1 amp each. For availability and lifecycle status, contact SpareTechPLC, your trusted supplier of industrial automation parts.
Troubleshooting & Common Issues
If outputs fail to energize, check the DC supply voltage and ensure it is within the 10-30 Volts DC Source range. Verify that the backplane current draw does not exceed the chassis capacity. For intermittent issues, inspect the Removable Terminal Block connections. The module's step response of 60 milliseconds in and 2.5 milliseconds out helps diagnose timing-related problems.
