Description
Key Technical Specifications
- Model Number: HC422B-N-300
- Manufacturer: Toshiba
- Series: Industrial Control System
- Product Type: PLC Control Board / Module
- Processor: Hard PLC LD Instruction Processor
- Operating Voltage: 24 VDC (Power Group)
- Processing Speed: 50 MHz
- Input Filter Delay: ~10 ms (ON/OFF transition)
- Environmental Temp: -40°C to +85°C
- Environmental Humidity: 20% to 80% (Non-condensing)
- Certifications: UL Listed
Functional Role & Application Analysis
The Toshiba HC422B-N-300 serves as a core control board within Toshiba’s industrial automation ecosystem. It is engineered to monitor and control various industrial equipment, providing a highly integrated environment for real-time data processing. The board operates on a strict cyclic scanning mechanism. Before executing the user program, it reads all input terminal states into an image register. During program execution, these input states remain locked, ensuring deterministic logic evaluation regardless of external signal fluctuations. Only at the start of the next scan cycle are new input states read.
This deterministic architecture makes the module ideal for environments where process stability is critical. Once the sequential logic运算 is complete, the board transfers the output image register states to an output latch register, triggering the actual physical outputs. The external output contacts feature a built-in response delay to accommodate mechanical relay switching times. This module is widely deployed in manufacturing, facility automation, and building management systems, specifically for controlling motors, pumps, and HVAC infrastructure.
Typical use cases include:
- Manufacturing Automation: Serving as the primary logic solver for automated assembly lines and material handling systems.
- Building Management Systems (BMS): Regulating HVAC equipment, pumps, and environmental controls in commercial facilities.
- Legacy System Maintenance: Replacing degraded control boards in aging Toshiba PLC systems to prevent unplanned downtime.
Our Quality Standard & Testing Process
We know that replacing a failed PLC control board is a high-stakes operation. A faulty module can introduce logic errors that take days to troubleshoot. We have established a rigorous, multi-stage testing process to ensure every HC422B-N-300 we ship operates exactly to factory specifications.
- Visual & Component Inspection: Technicians perform a detailed physical inspection of the PCB, checking for compromised components, cold solder joints, or corrosion that could affect the 50 MHz processor or 24 VDC power circuits.
- Live System Test: The board is installed in a live Toshiba test rack and run through an extended burn-in period to verify continuous operation, processor stability, and backplane communication.
- Full-Function Diagnostics: We simulate input signals to verify the 10 ms filter delay and image register latching. We then execute test programs to confirm sequential logic execution and output latch transfer timing.
- Warranty Backing: Only boards passing all diagnostic tests are approved for shipment. We back this process with a full 12-month warranty, giving your maintenance team confidence in the spare.
TOSHIBA HC422B-N-300
Compatibility & Migration Paths
PLC control boards are not universally interchangeable. The HC422B-N-300 has specific hardware and firmware requirements that must match your existing system exactly. Installing an incompatible revision can corrupt your control logic or damage the backplane.
- Firmware/Hardware Revisions: You must confirm your existing system firmware supports the N-300 revision. Earlier controller firmware may not recognize this board or may lack the necessary instruction set support.
- Required Components: Verify that your existing base unit and power supply are compatible with the 24 VDC power group requirements. Check the physical form factor matches your rack slot configuration.
- Replacement & Alternatives: Confirm this exact part number matches your failed unit. Do not assume cross-compatibility with other HC422B variants without verifying the N-300 suffix.
- Get Expert Help: Send us a photo of your current module nameplate and system configuration. Our technical team will verify compatibility and confirm the correct part number before you order.
