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TB846

ABB TB846 3BSE021439R1 Module Termination Unit S800 I/O

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  • Manufacturer: ABB

  • Product No.: TB846

  • Product Type: Cable Adaptor

  • Product Origin: SE

  • Payment:T/T, Western Union

  • Weight: 180g

  • Shipping port: Xiamen

  • Warranty: 12 months

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Product Overview

The TB846 (3BSE021439R1) is an industrial Module Termination Unit (MTU) from ABB's S800 I/O mechanics series. Weighing 180 g with compact dimensions (43 x 31.5 x 186 mm), it provides physical mounting and terminal connections for I/O modules in DCS applications. Built with ISA-S71.04 Class G3 protection, IP20 rating, and ATEX Zone 2 certification, it ensures reliable signal routing in severe operating environments.

Core Technical Advantages

  • ISA-S71.04 G3 Protection: Conformal coatings resist corrosive gases, moisture, and sulfur in harsh industrial plants.
  • Hazardous & Marine Rated: Certified for ATEX Zone 2, Class I Div 2, and major marine societies (ABS, BV, DNV, LR).
  • Compact Footprint: 43 mm width optimizes cabinet space and increases module packing density.
  • Class I Grounding: Fully meets IEC 61140 Class I standards for high electrical safety and noise immunity.

Technical Specifications

Parameter Specification Details
Model & Part Number TB846 (3BSE021439R1)
Product Series ABB Mechanics S800 I/O
Dimensions (W x D x H) 43 mm x 31.5 mm x 186 mm
Net Weight 180 g (0.40 lbs)
Protection Class IP20 (IEC 60529)
Corrosion Rating ISA-S71.04 Class G3
Operating Temperature 0 to +55 °C (Storage: -25 to +70 °C)
Hazardous Certifications ATEX Zone 2, C1 Div 2, C1 Zone 2 (cULus)
Marine Certifications ABS, BV, DNV, LR
Safety & EMC Standards IEC 61131-2, UL 61010-1, EN 61000-6-2/4

Industrial Solutions

  • Marine & Offshore: Marine-certified for reliable operation on ships and offshore platforms.
  • Chemical Processing: G3 rating resists corrosive chemical fumes and airborne sulfur compounds.
  • Oil & Gas Refineries: ATEX Zone 2 approved for safe deployment in hazardous locations.
  • Power Stations: Delivers high noise immunity for critical I/O loops in power generation plants.

Wiring & Installation

Safety Isolation

Disconnect all system power before installation. Verify the atmosphere is non-hazardous prior to handling live terminals in ATEX Zone 2 areas.

DIN Rail Mounting

Mount the unit onto a standard 35 mm DIN rail. Ensure the grounded rail clip connects properly to establish Class I protective earth continuity.

Field Wiring Connection

Attach stripped field wires to the screw terminals. Keep signal lines separated from AC power cables to prevent electromagnetic noise coupling.

Module Insertion

Verify mechanical keying matches the target S800 I/O module. Push the module firmly onto the TB846 base until it locks securely into place.

Engineering Advantages

  • Space Optimization: Slim 43 mm width and lightweight 180 g build reduce overall panel footprint.
  • Global Approvals: Meets international UL, IEC, ATEX, and Marine standards for global deployment.
  • High Noise Immunity: EN 61000-6-2 compliance safeguards sensitive field signals from interference.

Technical FAQs

Q1: What does ISA-S71.04 G3 mean?
A1: It proves internal components resist harsh corrosive gases like H2S and SO2.

Q2: Can TB846 be used outdoors?
A2: No. Its IP20 rating requires mounting inside an IP/NEMA rated cabinet.

Q3: Is grounding required?
A3: Yes. As Class I equipment, it requires proper DIN rail grounding.

🏷️ Tags: Cable Adaptor

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