Description
Key Technical Specifications
- Model Number: USIO21
- Manufacturer: Toshiba
- Product Type: Universal Serial I/O (USIO) Communication Module
- System Platform: Toshiba TOSVERT / PLC Control Systems
- Data Capacity: 4 Megabytes Internal Memory
- Power Supply: 20 to 35 VDC
- Output Frequency: 50/60 Hz Compatible
- Operating Temp: -40°C to +125°C (Component Rated)
- Humidity: 5% to 95% (Non-Condensing)
- Weight: 0.32 kg
Functional Role & Application Analysis
The Toshiba USIO21 is a critical Universal Serial I/O module designed for Toshiba’s industrial control and drive ecosystems. It serves as the communication bridge, handling serial data exchange between the main controller, drive inverters, and peripheral devices like programming terminals or HMIs. This module solves the integration challenge in legacy Toshiba systems by managing the low-level serial protocols, buffering data, and ensuring reliable command transmission in electrically noisy factory environments.
Typical use cases include:
- Drive System Integration: Connecting TOSVERT inverters to the central PLC for speed control, monitoring, and fault reporting via serial bus.
- Peripheral Communication: Linking operator panels, barcode scanners, or printers to the control system for data logging and local control.
- Legacy System Maintenance: Replacing failed USIO modules in aging Toshiba PLC racks to restore network communication and prevent production stoppages.
Our Quality Standard & Testing Process
We know that a failed communication module can isolate an entire production cell. We do not ship unverified hardware. Every USIO21 undergoes a strict validation protocol to ensure it meets Toshiba’s original performance standards.
- Visual & Component Inspection: PCBs are inspected under magnification for cold solder joints, capacitor degradation, or connector pin damage common in aged electronics.
- Live System Test: The module is installed in a live Toshiba test rack and powered on to verify successful initialization and serial bus handshake.
- Full-Function Diagnostics: We execute serial data loopback and throughput tests to validate baud rate accuracy, data integrity, and response timing.
- Warranty Backing: Only units passing all diagnostic tests are approved for shipment and backed by our full 12-month warranty.
TOSHIBA USIO21
Compatibility & Migration Paths
To ensure this USIO21 integrates without issues, you must verify these critical parameters. Serial communication modules are highly sensitive to system configuration and firmware versions.
- Firmware/Hardware Revisions: Confirm your main PLC CPU firmware supports the USIO21 module. Older CPU revisions may not recognize this specific I/O card or may require a parameter update.
- Required Components: Verify the backplane slot assignment and termination resistor settings. Incorrect termination on the serial bus will cause communication failures.
- Replacement & Alternatives: This model is part of the USIO family. If your system has been upgraded, check if a USIO22 or newer variant is required for enhanced protocol support.
- Get Expert Help: Unsure about your Toshiba system version or serial bus configuration? Contact our technical team today for a free compatibility check.
