Product Description

The YNT511D-P42/KT is a dedicated optical bus repeater rack designed for Yokogawa CENTUM VP and Yokogawa CENTUM CS 3000 distributed control system architectures.

This 19-inch rack-mounted enclosure provides the physical and electrical platform for extending the Optical ESB (Extended Serial Backplane) bus, enabling long-distance communication between Field Control Stations (FCS) and remote I/O nodes without signal degradation.

With 13 dedicated slots for optical repeater modules, the unit offers a high-density and scalable solution for network expansion. Its modular design allows system growth by adding repeater cards as plant infrastructure expands.

The rack incorporates 1 kV DC galvanic isolation to prevent ground loops and protect critical control equipment from electrical disturbances. Low base power consumption and industrial-grade construction ensure stable operation in demanding environments.

Technical Specifications

Application

The YNT511D-P42/KT is widely used in:

• Refineries

• Petrochemical complexes

• Power generation plants

• Large-scale process facilities

It is particularly suitable when the distance between the FCS and remote I/O exceeds the limitations of copper cabling. By enabling fiber-optic ESB communication, the rack supports kilometer-level transmission distances while maintaining deterministic control performance and high data integrity.

FAQ

Q1: Is this rack compatible with both single-mode and multi-mode fiber modules?
The rack provides power and backplane connectivity. Fiber type compatibility depends on the installed optical repeater modules.

Q2: Does the YNT511D-P42/KT include repeater modules?
No. The model refers to the rack assembly only. Optical repeater cards must be ordered separately according to system topology.

Q3: What is the main benefit of the 1 kV DC isolation?
It prevents ground loops and protects central control processors from surge voltages originating in remote plant areas, improving overall system reliability.