The Hirose IX series has become one of the most popular connector families for compact industrial Ethernet and control applications.
While the A key version is commonly used for Ethernet data transmission, the B key version plays an equally important role in control and signal communication - providing a reliable interface for automation and embedded systems.
Understanding the IX B Key Cable
An IX B key cable is designed according to the IEC 61076-3-124 standard and uses a 10-pin interface similar to the A key type.
However, it is keyed differently to prevent misconnection between Ethernet and control lines.
This makes the B key ideal for non-Ethernet communication, such as control signals, digital I/O, or low-voltage device interfaces.
Typical assemblies include:
- IX40G-B-10S-CV(7.0) – IX B key plug connector with solder termination
- IX40G-B-10P-JC – IX B key in-line jack for panel-mount or modular coupling
How the B Key Differs from the A Key
| Feature | IX A Key | IX B Key |
|---|---|---|
| Function | Ethernet / data communication | Control / signal communication |
| Keying | Type A orientation | Type B orientation (non-interchangeable) |
| Typical Cable |
IX40G-A-10S-CV IX40G-A-10P-JC |
IX40G-B-10S-CV IX40G-B-10P-JC |
| Use Case | PLC-to-switch, camera-to-processor | Controller-to-sensor, HMI, I/O modules |
| Bandwidth | Up to 10 Gbps (Cat6A) | Signal-level data (non-Ethernet) |
This physical and electrical separation helps engineers avoid wiring mistakes and ensures network reliability in mixed communication systems.
Applications of IX B Key Cables
IX B key cables are widely used in:
- PLC and control modules
- Robotic control systems
- HMI devices and embedded boards
- Test and measurement equipment
- Industrial I/O or feedback lines
Their compact size and secure locking mechanism make them perfect for dense control cabinets, robotic arms, and embedded control units where space and vibration resistance are critical.
Conclusion
At Premier Cable, our IX B key cable assemblies - including IX plug to IX in-line jack extension, IX plug to IX plug, IX plug to RJ45 plug/socket, IX to M12 plug/socket - use genuine Hirose IX components for precise fit, shielding, and long-term reliability.
Whether you need Ethernet (A key) or control signal (B key) solutions, IX connectors deliver the compact and modular connectivity that modern automation systems demand.
Related Products
IX B Key To RJ45 Jack Cat6A Ethernet Cable
IX In-Line Jack to IX Plug Cable 10Gbps
IX B Key to M12 X-Code Female Cable
IX Industrial Category 6A Serial Cable
IX B Key To IX B Key Cat6A Serial Cable
IX Industrial Cable IX B Key to M12 X-Code
