ABB TB805 3BSE008534R1 S800 I/O Modulebus Bus Outlet

Product Overview

The ABB TB805 (3BSE008534R1) serves as a vital hardware interface for extending the S800 I/O Modulebus. This Bus Outlet adaptor features a 25-pin D-sub female connector, specifically designed to bridge the internal Modulebus backplane with external extension cables. It enables engineers to distribute I/O modules across multiple DIN rails or separate cabinet sections without losing signal synchronization. We supply this unit as 100% Brand New and Original, ensuring your industrial communication bus maintains factory-spec impedance and grounding.

Technical Specifications

The TB805 provides the physical transition point for high-speed bus expansion:

Engineering Advantages

• Seamless Multi-Rail Expansion: The TB805 allows the Modulebus to "exit" one I/O cluster and continue to another. This facilitates the expansion of a single I/O station across different tiers of a control cabinet, effectively overcoming the physical length limitations of a standard rigid backplane.

• Standardized D-sub Connectivity: By utilizing a 25-pin D-sub female interface, the TB805 creates a secure, standardized connection point for TK801 extension cables. This high-density connector ensures all Modulebus data lines and power references remain intact across the transition.

• Ultra-Compact Footprint: With a width of only 22 mm, the TB805 occupies minimal rail space. This "slim-line" design allows designers to maximize the number of active I/O modules on a single DIN rail while still providing a robust bus outlet for future expansion.

• Zero-Latency Bus Extension: The internal circuitry of the TB805 maintains the high-speed timing requirements of the Modulebus. It transfers data packets between clusters without introducing signal propagation delays, preserving the real-time performance of the DCS.

• Vibration-Resistant Mounting: The unit snaps firmly onto the S800 I/O mounting profile. Once installed, it resists mechanical shifts and vibrations common in industrial environments, preventing intermittent bus communication errors.

FAQs

• Does every S800 I/O cluster require a TB805?

  No. You only require a TB805 when you need to extend the Modulebus to a different DIN rail or cabinet section. Each extension cable (TK801) specifically requires one TB805 adaptor at the outlet point of the preceding cluster.

• How does the TB805 connect to the extension cable?

  The TB805 provides the female D-sub 25 port. You plug the male connector of the TK801 extension cable directly into the TB805. Ensure you tighten the D-sub thumb screws to maintain a secure electrical ground and prevent accidental disconnection.

• Can I use the TB805 for third-party bus communication?

  No. The TB805 is a proprietary component engineered specifically for the ABB S800 I/O Modulebus. Using it for non-ABB protocols may result in hardware damage or signal failure.

• What is the difference between a Bus Outlet and a Bus Inlet?

  The TB805 acts as the "Outlet" where the bus leaves a cluster. To bring the bus "In" to the next cluster, you typically utilize a TB806 Bus Inlet. Both are necessary to complete a successful Modulebus extension loop.