ABB CTB810 (HN800)
ABB CTB810 (HN800) - Image 2

ABB CTB810 (HN800)

Product Brief:​ The CTB810 is a passive termination / interface board mounted on the left side of an HPC800 controller base (MB810). It provides the physical connection points (D-sub, terminal blocks, or headers) for the HN800 I/O bus, CEX-bus expansion, and sometimes serial/ethernet service ports. It is not a processor — it routes signals between backplane and external cabling.

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Category: SKU: ABB CTB810 (HN800)

Description

ABB CTB810 (HN800)

  • Technical Specifications:
    • Function: Signal termination & EMI filtering for HN800 bus and CEX-bus links
    • Mounting: Left-side of MB810 base (guided pins + screws)
    • Connections: HN800 bus IN/OUT (RJ45 or D-sub per revision), CEX-bus expansion connectors, occasionally service serial port
    • Electrical: Passive — signal conditioning/filtering only; backplane-powered (no separate supply)
    • Max HN800 Electrical Segment: 30 m (copper); fiber via CRBX01extends to 3 km
    • Operating Temp. (cabinet): –20 °C to +55 °C
    • Protection: On-board TVS diodes for ESD/surge suppression on bus lines
  • Functional Features:
    • Clean separation of controller internal bus from field wiring
    • Labeled pinouts for HN800 A/B buses and CEX expansion
    • Facilitates hot-base swap — controller unplugged with CTB810 remaining cabled
    • LED indicators (on controller/base) reflect bus status, not on CTB810 itself
  • Application Scenarios:
    • Mandatory component in Symphony Plus HPC800 controller assemblies
    • Interfaces local I/O racks (SD Series) via HN800 copper or fiber (with CRBX01)
    • Used in power, pulp & paper, oil & gas DCS cabinets
  • Material & Structure:
    • PCB: FR4 with gold-plated edge fingers engaging controller base
    • Connectors: Insulation-displacement or screw-terminal blocks; RJ45 or DB9 for
    • Mounting hardware: Captive screws + guide pins
  • Working Principle:

    The CTB810 passively routes differential bus signals from the controller backplane to the external cabling. It includes RC filtering / ferrite beads to suppress high-frequency noise and ESD protection diodes on signal pairs. No signal regeneration or protocol processing occurs — it is purely a physical-layer interface.

  • Installation Requirements:
    • Align CTB810 with left-side guide pins of MB810 base; press in and secure with two captive screws
    • Connect bus cables observing A/B pair and shield grounding (shield typically grounded at controller end only)
    • Verify all connections are seated before powering controller
    • For fiber extension, connect CRBX01 to ports on CTB810
  • Precautions:
    • Handle by edges — avoid touching gold edge-fingers
    • Do NOT attempt to power separately — damage may occur if forced
    • Ensure bus is properly terminated (termination resistor plug or DIP-switch on last node) — missing termination causes reflection errors
    • When replacing controller (HPC800), can remain cabled — reduce strain on attached wires during removal

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