
ABB TB840A Bus Coupler
Overview:ABB TB840A is a Bus Coupler within ABB's System 800xA architecture according to supplier listings.Function:Bus Couplers connect different segments of the Modulebus+ network within System 800xA. Modulebus+ is an enhanced version of the Modbus protocol specifically designed for ABB's industrial automation systems.By connecting segments, Bus Couplers enable communication between controllers, I/O modules, and other devices spread across various network sections. This facilitates data exchange and system integration.Features:Network Segmentation: Supports dividing the Modulebus+ network into manageable segments, improving overall network performance and scalability.Data Repeating: Bus Couplers can repeat data packets on the connected segments, ensuring critical information reaches all necessary devices within the system.Isolation: May provide galvanic isolation between network segments, reducing the risk of ground loops and electrical noise that can disrupt communication.Applicatio