TB806 3BSE008536R1 | ABB S800 I/O Modulebus Bus Inlet

Product Overview

The ABB TB806 (3BSE008536R1) serves as the critical entry point for extending the S800 I/O Modulebus to subsequent clusters. While the TB805 acts as the "outlet," the TB806 functions as the "inlet," receiving the Modulebus signal from a TK801 extension cable and injecting it into the next DIN-rail mounted cluster. This component enables seamless horizontal or vertical expansion of the I/O station across different areas of a control cabinet. We supply this unit as 100% Brand New and Original, ensuring your distributed I/O architecture maintains high-speed synchronization and signal purity.

Technical Specifications

The TB806 provides the physical and electrical interface required for bus continuity:

• Product ID: 3BSE008536R1

• Type Designation: TB806

• Function: Modulebus Bus Inlet

• Connectivity: Interface for TK801 Extension Cable

• Width: 22 mm

• Height: 109 mm

• Depth: 25 mm

• Weight: 46 g

• Mounting: Snaps directly onto S800 I/O mounting profile

Engineering Advantages

• Facilitates Multi-Tier Cabinet Layouts: The TB806 allows the Modulebus to jump between different DIN rails. This flexibility enables engineers to distribute high-density I/O clusters across multiple rows within a single cabinet or between adjacent enclosures, effectively bypassing physical rack limitations.

• Low-Impedance Signal Coupling: The internal circuitry of the TB806 minimizes signal attenuation at the cable-to-backplane transition. By maintaining tight impedance control, the adaptor prevents data packet reflections that could otherwise lead to communication timeouts in high-speed Modulebus applications.

• Ultra-Slim Profile: At only 22 mm wide, the TB806 occupies minimal space on the mounting rail. This compact design prioritizes rail real estate for active I/O modules while providing a robust and accessible inlet point for the extension bus.

• Vibration-Resistant Engagement: The unit locks securely into the S800 I/O framework. Once the TK801 cable attaches to the TB806, the mechanical assembly resists the constant vibrations found in industrial motor control centers (MCC) and turbine halls, preventing intermittent bus errors.

• Zero-Configuration Integration: The TB806 functions as a passive electrical interface. It requires no software addressing or firmware updates, allowing for immediate "plug-and-play" expansion of the I/O cluster during commissioning or system upgrades.

FAQs

• Can I use the TB806 without a TB805?

  No. A complete Modulebus extension loop requires a TB805 at the outlet of the first cluster and a TB806 at the inlet of the second cluster. These two adaptors work together with the TK801 cable to bridge the gap between separate DIN rails.

• How many TB806 units can I use in a single I/O station?

  The maximum number of TB806 units depends on the total allowable length of the Modulebus and the number of modules in the cluster. Typically, S800 systems support up to 7 clusters, meaning you could utilize multiple TB806/TB805 pairs within the total bus length limits.

• What is the recommended installation sequence for the TB806?

  Snap the TB806 onto the DIN rail at the far left position of the new I/O cluster. Connect the TK801 extension cable from the previous cluster's TB805 to this TB806 inlet. Ensure you tighten the connector screws to maintain a solid electrical ground.

• Does the TB806 provide power to the next cluster?

  Yes. The TB806 transfers both the 24V DC process power and the 5V DC logic power across the TK801 cable to the next cluster's backplane, assuming the total current consumption remains within the limits of the primary power source.