The ABB TB846 3BSE021439R1, also cataloged as the TB846 ModuleBus Cable Adaptor, operates as a dedicated hardware component for redundant electrical bus extension and cable interconnectivity within S800 I/O architecture networks.

Hardware Identification & Component Architecture

• TB846: Base model code for the redundant electrical ModuleBus cable inlet adapter.
• 3BSE021439R1: Factory article ordering code and designated hardware unit identifier.
• Redundant Adaptor Topology: Dual-cable interface supporting bus splitting across separate DIN rail rows.

Physical Parameters & Technical Limits

Backplane Communication Velocity & Density Scaling

The adapter unit maintains continuous ModuleBus bus communication velocity across segmented DIN rail mounting profiles without signal degradation. Interfacing via TK801V0xx cables or TB842 optical modules enables high I/O density scaling across extended cabinet layouts while ensuring uninterrupted signal timing and controller firmware flash compatibility.

Delivery Package Manifest

• 1 x ABB TB846 3BSE021439R1 Redundant ModuleBus Cable Adaptor

Cabinet Installation & Cable Grounding Protocol

• Mount the adapter firmly onto the designated 35 mm DIN rail within the S800 cluster row.
• Connect the dual TK801V0xx extension cables into the redundant ModuleBus cable ports.
• Verify proper engagement of mechanical retention clips on cable plugs to prevent loose connections.
• Ensure direct metallic earthing between the unit casing and the panel DIN rail for grounding protection.

Frequently Asked Questions

• What primary function does the TB846 module adapter perform in an S800 system?

  It extends the electrical ModuleBus across different DIN rails using TK801V0xx bus cables.

• What operating temperature range is rated for this component?

  The module is certified for normal operational environments ranging from 0 to +55 deg C.

• What IP ingress protection rating applies to the outer casing?

  The physical enclosure conforms to the standard IP20 protection class according to IEC 60529.

• How does the adapter interface with optical extension hardware?

  It pairs with the TB842 optical module to convert electrical ModuleBus lines into optical signals.

• What mechanical dimensions define the physical housing footprint?

  The outer structure measures 186 mm in height, 43 mm in width, and 31.5 mm in depth.

• What environmental corrosion standard is satisfied by the unit construction?

  The hardware features harsh-environment protection compliant with ISA-S71.04 Class G3 standard.

• Does the adaptor unit consume active power from the backplane rail?

  No, as a passive physical interface adapter, it processes signals without drawing active current.

• Is the TB846 certified for deployment in hazardous plant locations?

  Yes, it holds Class 1 Division 2, Zone 2, and ATEX Zone 2 certifications for hazardous areas.