Product details
Specifications
Recommand
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PRODUCT IDENTITY

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ABB

S800 I/O · MODULEBUS

TYPE DESIGNATION

TB840

3BSE021456R1

OFFICIAL PRODUCT NAME

ModuleBus Cluster Modem

Optical cluster communication for redundant ABB S800 I/O and ModuleBus installations.

CONDITIONNew Original

WARRANTYOne year

AVAILABILITYIn stock

TECHNICAL PROFILE

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The TB840 provides optical cluster communication between ABB S800 I/O stations and the ModuleBus architecture, supporting redundant operation in installed 800xA and Compact Product Suite systems.

TECHNICAL SPECIFICATIONS

Manufacturer	ABB
Article number	3BSE021456R1
Type designation	TB840
Product family	S800 I/O
Product type	ModuleBus Cluster Modem
Communication	Optical ModuleBus
Operating mode	1+1 redundant
Data rate	10 Mbit/s
Replacement	TB840A · pin compatible

PERFORMANCE & EFFICIENCY

Designed for deterministic 10 Mbit/s ModuleBus communication and 1+1 redundant cluster operation. The pin-compatible TB840A successor supports controlled maintenance without changing the documented system function.

10 MBIT/S

REDUNDANT

TB840A READY

APPLICATION SCENARIOS

Applied in ABB S800 remote I/O clusters, process-control cabinets and lifecycle retrofit projects that require optical ModuleBus extension and redundant communication paths.

S800 I/O

I/O CLUSTERS

RETROFIT

BRAND & APPLICATION OVERVIEW

BRAND CHARACTERISTICS

ABB S800 I/O hardware uses documented type designations, article numbers and modular termination architecture to support traceable engineering, controlled replacement and long-term plant maintenance.

APPLICATION FIELDS

Used across continuous-process plants, utilities, power generation, pulp and paper, metals and infrastructure systems that operate ABB 800xA or Compact Product Suite remote I/O.

DOCUMENTED

MODULAR

LIFECYCLE READY

PROCESS CONTROL

POWER & UTILITIES

MODERNIZATION

RELATED MODELS

ABB

TB840A	TB820V2	TB825	TB826	TB842
CI840A	CI845	CI854A	TU840	TU841
TU848	TU849	AI880A	DI840	DO840
DP840	AO845A	AI845	TU844	TU845

Koyo Electronics

D2-230	D2-240	D2-250-1	D2-260	D2-430
D2-440	D2-450	D2-16ND3-2	D2-16NA	D2-16TD1-2
D2-08NA-1	D2-04AD	D2-08AD-1	D2-02DA	D2-08TR
D4-450	D4-16ND2	D4-16TD2	F2-04AD-1	F2-08DA-1

ORDER & SERVICE FLOW

01 · IDENTIFY

Provide the complete TB840 and 3BSE021456R1 markings, installed system, equipment position and required quantity.

02 · VERIFY

Confirm the full order code, hardware revision, companion termination unit, optical connections and installed architecture.

03 · QUOTE

Review condition, availability, warranty, lead time, protective packing and destination-based delivery terms.

04 · DISPATCH

Complete identity checks, connector protection, shipment documentation and destination routing before release.

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The description, explanation, or sale of products with these names, trademarks, brands, and logos is for identification purposes only and is not intended to indicate any association with or authorization from any rights holder.

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ABB TB840 3BSE021456R1 ModuleBus Cluster Modem

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