Configured for high-speed Vnet communication within Field Control Unit node architectures, the Yokogawa VC401-10 (VC401 Coupler Unit) provides direct physical/electrical execution.
Suffix Breakdown & Model Matrix
Parameter / Suffix Code
Specification Breakdown
Base Model (VC401)
Coupler Unit for Vnet communication bus
Safety / Function (-10)
Standard operational specification code
Hardware Specifications
Parameter
Specification
Model
VC401-10
Brand
Yokogawa
Origin
Japan
Weight
0.39 lbs
Dimensions
Standard CENTUM node module form factor
Operating Temp
0 to 55 deg C
Power Consumption
5 VDC system backplane bus draw
Network Protocol
Yokogawa Vnet communication bus
4-20 mA HART Loop Protocol & Channel Isolation
The module incorporates physical transformer isolation and noise-filtering circuits to decouple host node logic from external Vnet bus transmission lines. Integrated signal-conditioning barriers protect internal communication channels from ground loops and high-frequency EMI, ensuring stable transmission of real-time control data. This noise immunity preserves measurement accuracy for field-facing I/O modules handling 4-20 mA HART loop protocol communications passing across the control node network.
Frequently Asked Questions
Q: Can the VC401-10 Vnet coupler unit be hot-swapped while the Field Control Unit is powered?
A: Hot-swapping is permitted only when installed within a redundant Vnet bus configuration where the secondary active coupler module maintains network traffic without packet loss.
Q: What network cable grounding practices must be enforced when connecting the Vnet interface?
A: Outer coaxial or shielded twisted-pair cable shields must connect directly to the system protective earth (PE) bus bar at entry points to suppress high-frequency common-mode noise.
Field Installation Guidelines
Mount the VC401-10 module into its designated slot on the node rack, ensuring the rear backplane connectors engage fully before securing the top and bottom retaining screws to 0.5 Nm torque. Route Vnet communication cables in dedicated wire raceways, keeping a minimum 150 mm physical separation from high-voltage AC power wiring. Connect all shield drain wires directly to the main cabinet protective earth (PE) grounding bar using short conductors. Maintain cabinet ambient temperature between 0 and 55 deg C to ensure continuous real-time bus operation.
