Technical Function Overview
The YCB148 is a high-precision 50 Ω bus terminator designed for Yokogawa V net communication systems. In 10BASE-2 (Thin Ethernet) coaxial networks, signal reflections at cable endpoints can cause data corruption and communication errors.
The YCB148 provides impedance matching termination, absorbing reflected signals at the physical ends of the bus. This ensures stable deterministic communication between Field Control Stations (FCS) and Human Interface Stations (HIS) in CENTUM distributed control systems.
Detailed Engineering Specifications
| Parameter | Specification |
|---|---|
| Model | YCB148 |
| Impedance | 50 Ω ±1% |
| Network Standard | V net (10BASE-2 coaxial) |
| Connector Type | BNC-compatible interface |
| Housing Material | Industrial-grade metal shell |
| Operating Temperature | -20°C to +60°C |
| Function | Signal reflection suppression / impedance matching |
| Installation Requirement | 2 units per V net segment |
Critical Installation Guidelines
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End-of-line termination is required at both physical ends of every V net segment.
-
Redundant V net architectures require termination on both primary and secondary bus chains.
-
Proper termination helps maintain grounding continuity and improves EMI noise immunity in industrial environments.
Technical FAQ
Can I use a standard 50 Ω BNC terminator?
No. While physically compatible, only certified YCB148 terminators are recommended for Yokogawa V net systems to maintain reliability and certification integrity.
How do I check if the terminator is faulty?
Use a multimeter to measure resistance between the center pin and outer shell. A normal reading should be approximately 50 Ω. Significant deviation or open circuit readings indicate failure.
Does it support Vnet/IP?
No. The YCB148 is designed for coaxial V net networks only. Vnet/IP uses Ethernet-based communication and does not require coaxial terminators.
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