Product Overview

The Yokogawa YCB301-C500 is a high-performance communication interconnect designed for the Enhanced Service Bus (ESB) architecture within the CENTUM VP and CS 3000 Distributed Control Systems (DCS). With a generous 5-meter length, this cable provides the necessary reach to bridge communication between Field Control Units (FCUs) and expansion Node Units located in different cabinets or across extended rack sections. It acts as the primary data conduit, ensuring the deterministic, real-time transmission of process variables and control logic essential for stable plant operations.

Engineered for the most demanding industrial sectors—including oil and gas, power generation, and pharmaceutical manufacturing—the YCB301-C500 features heavy-duty shielding. This architecture prevents data corruption from electromagnetic interference (EMI) and radio frequency interference (RFI), which are common in environments with large motors and high-voltage switching. The 36-pin high-density connectors ensure a secure, low-latency interface that maintains system integrity even under continuous vibration.

Technical Configuration

The YCB301-C500 employs a specific nomenclature to define its physical capabilities and compatibility within the Yokogawa FIO (Field Internal Operator) system.

Model Suffix Breakdown

• YCB301: Base model for the ESB Bus Cable series, utilizing a proprietary 36-to-36 pin high-density connector set.

• -C500: Specifies the extended physical length of the cable. The "500" indicates a 5.0-meter (approximately 16.4 feet) span, which is ideal for multi-cabinet configurations where shorter cables cannot reach.

Technical Specifications

Installation Guide

Due to the 5-meter span of the YCB301-C500, proper installation is critical to avoid signal attenuation and physical wear.

Secure Termination

Plug the 36-pin connectors into the dedicated ESB ports. Always use the integrated thumb-screws to lock the cable in place. In a 5-meter run, the weight of the cable can cause mechanical stress on the port; ensure the cable is properly supported by cable ties or raceways near the connection point to prevent "connector sag."

Routing and Separation

When routing the YCB301-C500 through cable ducts, maintain at least 10 cm of separation from AC power lines. Although the cable is shielded, the increased length of a 5-meter run makes it more susceptible to inductive noise if placed directly alongside high-current conductors.

Avoid Cable Coiling

If the 5-meter length provides excess slack, do not coil the remaining cable into tight circles, as this can create an unintended inductor. Instead, "S-route" the excess length flat within the cabinet wire management system, respecting the minimum 45 mm bend radius.

Engineering Advantages

The YCB301-C500 is built with high-purity copper conductors and gold-plated contact pins to ensure maximum conductivity and resistance to oxidation. This is particularly important for 5-meter runs where voltage drop and signal reflection must be kept to an absolute minimum. The robust, chemical-resistant outer jacket ensures the cable remains flexible and functional in harsh environments where oil, moisture, or corrosive vapors may be present. By utilizing genuine Yokogawa hardware, you ensure that your DCS diagnostics can accurately monitor bus health and performance without the false alarms associated with inferior, third-party cables.

Delivery and Logistics

We offer fast, reliable shipping for the YCB301-C500 to support your project deadlines and maintenance schedules.

• Delivery Time: 3-5 days when payment finish.

• Shipping Carriers: Express global delivery via DHL, FEDEX, or UPS.

• Packaging: Shipped in original, factory-sealed packaging with protective caps on both 36-pin connectors.

Technical FAQs

Q1: Does the 5-meter length cause any communication lag in the DCS?

A1: No. The ESB bus protocol is designed to handle lengths up to 10 meters using standard copper cables without introducing significant latency. The YCB301-C500 is fully tested to meet Yokogawa’s real-time performance specifications.

Q2: Can I use this cable for the "ER Bus" instead of the "ESB Bus"?

A2: No. While they may look similar, the ER Bus (Extended Remote Bus) uses different hardware and protocols. The YCB301-C500 is strictly for ESB Bus configurations.

Q3: Is the YCB301-C500 suitable for outdoor cable trays?

A3: This cable is designed for use within industrial enclosures or protected cable ducts. If routing between buildings, we recommend using the Yokogawa Optical ESB Bus Repeater modules and fiber optic cabling instead.

Q4: What happens if the cable is accidentally cut while the system is live?

A4: If the system is redundant, the secondary bus cable will maintain communication. However, the system will immediately trigger a high-priority "Bus Fault" alarm. Replacing the cable should be done during a maintenance window or with extreme caution on a live redundant system.