Product Overview

The BC820K02 is a specialized CEX-Bus Interconnection Kit manufactured by ABB, designed to facilitate the expansion and segmentation of communication ports within the AC 800M controller architecture. This unit serves as a high-availability bridge, allowing the CEX-Bus to be partitioned into two distinct segments separated by distances of up to 200 meters. By enabling the use of redundant communication interfaces and supporting the extension of RCU-Link signals, the BC820 ensures that critical automation networks remain robust and fault-tolerant. The module is engineered to support professional-grade uptime requirements, featuring native support for hot-swapping and online CPU replacement without interrupting system processes.

Core Hardware Parameters and Environmental Data

• Processor Compatibility: Fully compatible with PM858, PM862, PM866, and PM866A controller units.

• Interface Capacity: Manages up to 6 CEX-Bus interfaces per interconnection unit.

• Expansion Limits: Extends physical bus and RCU-Link cable reach to a maximum of 200 meters via optical and copper links.

• Hot Swap Capability: Designed for maintenance and module replacement while the system remains energized.

• Kit Contents: Includes 2x BC820 units, 2x TP850 baseplates, 2x TK857 RCU-link cables, and 2x TB850 terminators.

Industrial Deployment Contexts

This interconnection unit is primarily utilized in large-scale Distributed Control Systems (DCS) where geographical separation of hardware or high levels of fault tolerance are mandatory. In sectors such as oil and gas or power generation, the BC820K02 allows engineers to place redundant communication modules in different physical cabinets to prevent a localized failure from compromising the entire network. Its Swiss-engineered reliability makes it a staple for maritime applications, as evidenced by its ABS and DNV-GL certifications. Furthermore, the 200-meter extension capability is vital for sprawling manufacturing facilities that require synchronized control over extended distances without degrading signal integrity or increasing latency.

FAQ

Q: Does the BC820K02 kit include the 200-meter long-distance fiber optic cables?

A: No, the long-distance RCU Control Link (RJ45 crossover) and RCU Data Link (OM3 fiber) cables are not included in the kit and must be sourced separately to meet the specific length requirements of your installation.

Q: Can the BC820 operate without an external power supply?

A: While the BC820 can draw power directly from the processor via the CEX-Bus, utilizing the external power connector is highly recommended to provide redundant power and ensure the highest level of system availability.

Q: Which fiber optic connector type is required for the RCU Data Link?

A: The unit is compatible with LC Duplex optical connectors conforming to ANSI TIA/EIA60-10 standards, specifically optimized for 50/125μm OM3 multimode fiber.

Q: Is this module suitable for use in explosive atmospheres?

A: Yes, the BC820K02 carries cULus Class 1, Zone 2, and ExnA IIC T4 Gc X certifications, making it suitable for hazardous locations where specific safety protocols are required.

Q: What is the maximum number of CEX-Bus interfaces supported by a single unit?

A: Each BC820 interconnection unit is limited to supporting a maximum of 6 CEX-Bus interfaces to maintain optimal signal performance and processing speed.