Description
Product Name: 1746-HCA Allen Braley I/O module
Product details:
The Allen-Bradley 1746-HCA is a specialized module within the SLC 500 family. Specifically, it is a High Current Adapter designed to provide additional backplane power for SLC 500 racks that house power-hungry modules.
1. Product Description
The 1746-HCA is an I/O chassis adapter module that allows an SLC 500 system to support modules with high current requirements. It acts as a power supplement, ensuring that the backplane voltage remains stable even when populated with multiple high-density or high-load specialized modules (like certain motion control or communication cards).
2. Technical Specifications
While some specifications depend on the specific series (A or B), the general parameters are as follows:
| Parameter | Specification |
| Series | SLC 500 |
| Module Type | High Current Adapter |
| Backplane Current (5V DC) | Supplemented based on chassis load |
| Backplane Current (24V DC) | Supplemented based on chassis load |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Storage Temperature | -40°C to 85°C (-40°F to 185°F) |
| Humidity | 5% to 95% (non-condensing) |
| Slot Requirement | Typically occupies a single slot in the 1746 chassis |
3. Product Advantages
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System Stability: Prevents voltage drops and erratic CPU behavior by providing a dedicated power boost to the backplane.
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Scalability: Enables the use of advanced, high-power I/O modules that would otherwise exceed the standard power supply capacity.
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Seamless Integration: Designed specifically for the 1746 chassis, requiring no complex wiring or external converters to interface with the SLC backplane.
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Longevity: Protects the primary power supply from overcurrent stress, extending the life of the overall control system.
4. Usage Precautions (Important)
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Power Budgeting: Before installation, always perform a power consumption calculation for your SLC 500 rack. The 1746-HCA should only be used if the total module draw exceeds the rating of your primary power supply (e.g., 1746-P1, P2, or P4).
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Slot Placement: Ensure the module is seated correctly in the designated slot. Improper seating can cause intermittent communication errors.
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Electrostatic Discharge (ESD): Like all SLC components, this module is sensitive to static. Wear a grounding wrist strap during installation.
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Firmware Compatibility: Ensure your SLC 500 processor firmware supports the high-current configuration if you are using advanced motion modules.
5. Product Applications
The 1746-HCA is typically found in complex industrial environments where standard digital I/O is replaced by “heavy-duty” modules:
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Motion Control: Systems using multiple 1746-HSTP1 (Stepper) or 1746-HSRV (Servo) modules.
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Complex Communication: Racks with multiple scanner cards or heavy-load network modules (DeviceNet/ControlNet).
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High-Density Analog: Systems with numerous 16-channel analog input/output cards that draw significant 5V backplane power.
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Legacy System Upgrades: When adding modern, power-intensive specialized modules to an existing SLC 500 architecture.
Advantages: Foxboro, OVATION, TRICONEX, Allen-Bradley, ABB, Motorola, Siemens Moore, Ge Fanuc, Woodward, Bently Nevada and other major import brands!
We have the same series of models in stock. If you don’t find the model you need, please contact us and we will provide you with an official quotation！
Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: Sweden
Price: Please contact us Product weight：0.515kg
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