Product Core Brief
- Model: YNT511D
- Brand: YOKOGAWA
- Series: CENTUM V-net / Vnet/IP Network Hardware
- Core Function: Optical bus repeater rack for Yokogawa V-net communication
- Product Type: V-net Bus Repeater Rack
- Key Specs: V-net fiber optic repeater | Bus signal regeneration | CENTUM VP / CS 3000 compatible
- Condition: New Original / New Surplus / Refurbished
⚠️ Public technical documentation for YNT511D is limited. Exact fiber type, port count, compatible V-net version, power supply, and mounting details should be confirmed against the site nameplate or network topology before ordering.
Key Technical Specifications
- Product Type: V-net Bus Repeater Rack
- Compatible System: YOKOGAWA CENTUM VP / CENTUM CS 3000 DCS
- Network Type: V-net / Vnet/IP control network
- Core Function: Optical bus repeater for V-net signal regeneration and distance extension
- Application: Inter-cabinet V-net communication, long-distance control network links, fiber optic bus extension
- Mounting Type: Rack-mounted repeater unit
- Power Supply: To be confirmed from nameplate
- Fiber Interface: Fiber optic ports typical for Yokogawa V-net optical repeaters
- Status Indicators: LED indicators typical for Yokogawa network hardware
- Origin: Japan
⚠️ Specific fiber connector type, number of optical ports, supported transmission distance, and redundancy configuration are not fully confirmed from available references. Verify against the installed unit nameplate.
Product Introduction
The YOKOGAWA YNT511D is a V-net bus repeater rack used in Yokogawa CENTUM distributed control systems. It functions as an optical bus repeater for the V-net communication network, regenerating and retransmitting control network signals to extend communication distance and improve signal reliability between control stations, field control units, and network nodes.
This unit is typically used in existing CENTUM VP or CENTUM CS 3000 installations where V-net fiber optic links require extension, redundancy, or replacement. Because YNT511D is a network infrastructure device rather than an I/O module, correct fiber type, port configuration, and network topology must be confirmed before substitution. This unit is supplied as new original, new surplus, or refurbished, depending on stock availability.
QA & Testing SOP
Each unit is inspected before dispatch:
- Visual inspection: Check rack housing, front panel, fiber ports, power connector, mounting hardware, and signs of heat stress or corrosion.
- Model verification: Confirm YOKOGAWA branding and full model code YNT511D against the site BOM or existing unit nameplate.
- Connector inspection: Check fiber optic ports for contamination, scratches, or mechanical damage. Verify power and grounding terminals.
- Power-on test: Where a compatible test setup is available, verify power-up, LED status, and basic network link indication.
- Fiber link check: Confirm optical port functionality under controlled test conditions where test equipment permits.
- Anti-static packaging: Packed with protective foam and fiber port caps to prevent transit damage.
Installation Pitfalls & Guide
❗ Confirm the exact V-net version before installation. YNT511D is associated with Yokogawa V-net optical repeater applications, but compatibility with specific CENTUM VP or CS 3000 network versions must be verified.
❗ Match fiber type and connector type. Using the wrong fiber type or connector can cause link failure or excessive attenuation.
❗ Do not substitute with generic media converters. V-net optical repeaters are designed for Yokogawa control network protocols. Standard Ethernet media converters are not compatible.
❗ Verify network topology and redundancy configuration. Replacing a V-net repeater may affect redundant communication paths. Follow site DCS network maintenance procedures.
Replacement steps:
- Pre-install: Photograph the existing unit, record fiber connections, port assignments, and network topology.
- Removal: Follow site DCS network maintenance procedures. Label all fiber connections before removal.
- Install: Mount the replacement unit, reconnect fiber cables with proper polarity, and verify power supply.
- Commissioning: Power up the unit and confirm V-net communication status via CENTUM system diagnostics.
Technical FAQ
Is pricing flexible for multiple units? Yes. Price depends on condition, quantity, and lead time. New original, new surplus, and refurbished stock are quoted separately. Send your quantity and we can provide a project-level quote.
What warranty is included? Standard warranty is 12 months from shipment for functional defects. This covers pre-shipment or manufacturing failures, not damage from incorrect installation, fiber contamination, or environmental misuse.
Is YNT511D compatible with CENTUM VP? YNT511D is associated with Yokogawa V-net optical repeater applications and is commonly referenced in CENTUM VP / CS 3000 spare-parts channels. However, exact compatibility should be confirmed against the installed system version and network topology.
Can this unit be replaced with a newer Yokogawa repeater? Possible, but V-net hardware compatibility depends on the system version, fiber type, and network configuration. A side-by-side nameplate comparison is recommended before substitution.
