ABB TU843 3BSE021443R1
ABB TU843 3BSE021443R1
ABB TU843 3BSE021443R1
ABB TU843 3BSE021443R1
ABB TU843 3BSE021443R1
ABB TU843 3BSE021443R1
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TU843 3BSE021443R1

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ABB TU843 3BSE021443R1 is a vertical 16-channel, 50 V redundant terminal-block MTU for selected S800 I/O modules for the S800 I/O Module Termination Units family.
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Technical specifications for TU843 3BSE021443R1

  • Manufacturer:
    ABB
  • Part Number:
    TU843 3BSE021443R1
  • Product Family:
    ABB Advant OCS and Advant-800xA
  • Product Type:
    Redundant Module Termination Unit
  • Stock:
    1
  • MTU Type:
    Redundant
  • Termination Interface:
    Terminal block
  • I/O Channels:
    16
  • Rated Signal Voltage:
    50 V
  • I/O Arrangement:
    Redundant
  • Mounting:
    Vertical DIN rail
  • Compatible I/O Modules:
    AI843, AO845, AO845A, DI840, DI880, DO840, DO880, DP840
  • Process Connections:
    56; 32 channel, 4 process-power, 20 zero-volt
  • Maximum Channel Current:
    3 A
  • Maximum Process Current:
    10 A
  • Conductor Range:
    Solid 0.2-4 mm2; stranded 0.2-2.5 mm2 (24-12 AWG)
  • Recommended Torque:
    0.5-0.6 Nm
  • Stripping Length:
    7 mm
  • Dielectric Test:
    500 V AC
  • Mechanical Keying:
    Four keys; 36 configurations
  • Operating Temperature:
    0 to +55 C
  • Storage Temperature:
    -40 to +70 C
  • Relative Humidity:
    5-95%, non-condensing
  • Protection Rating:
    IP20
  • Corrosion Protection:
    ISA-S71.04 G3
  • Product Dimensions:
    131 mm including connector; 124 mm installed; 64 mm deep; 186.5 mm high
  • Weight:
    0.66 kg
  • Tariff Code:
    85371098
  • Country of origin:
    Sweden
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Vertical MTU Layout Redundant I/O Matching Wiring Review

Features:

  • Vertical redundant MTU: TU843 mounts vertically and connects two ModuleBus paths.
  • Fifty-six connections: The terminal plan covers 16 channels plus process-power and 0 V distribution.
  • Mechanical keying: Four keys provide 36 permitted mechanical configurations.

TU843 is the vertical member of ABB’s redundant 50 V S800 I/O termination arrangement.

The MTU is passive: redundancy behavior and diagnostics belong to the installed I/O and system design, not an undocumented internal switch function.

Replacement review should compare TU843 and 3BSE021443R1 with the module label, terminal drawing, power grouping, mounting direction, and mechanical keys.

Availability is subject to Apter Power's current inventory and sourcing confirmation.

Internal resources for TU843 3BSE021443R1:

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

ABB TU843 3BSE021443R1 Redundant Module Termination Unit Specs

General

  • Manufacturer ABB
  • Model TU843 3BSE021443R1
  • Condition New Original ready stock
  • Product Family S800 I/O Module Termination Units
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Vertical mounting review

  • Orientation: Install in the documented vertical direction.
  • Terminal access: Maintain clearance for all 56 connections.
  • Connector envelope: Allow for the full connector width and latch height.
  • Rail record: Retain the cabinet location and grounding details.

Exact module verification

  • Analog scope: Check AI843, AO845, or AO845A.
  • Digital inputs: ABB lists DI840 and DI880.
  • Digital outputs: ABB lists DO840 and DO880.
  • Pulse input: ABB lists DP840.

Terminal and load checks

  • Channel current: Keep each I/O channel within 3 A.
  • Process current: Keep the process connection within 10 A.
  • Wire range: Apply the official solid or stranded limits.
  • Preparation: Use 0.5-0.6 Nm torque and 7 mm stripping length.
Description
The ABB TU843 3BSE021443R1 is a vertical 16-channel, 50 V redundant terminal-block MTU for selected S800 I/O modules in the ABB S800 I/O family.

TU843 3BSE021443R1 is documented with the following system role: Its 56 connections provide two terminals per channel, four process-power terminals, twenty 0 V terminals, and two ModuleBus paths.

Before ordering TU843 3BSE021443R1, verify vertical mounting, the exact I/O module, wiring schedule, channel and process loads, four key positions, and complete article number.
Alternative Names
TU8433BSE021443R1 TU843 3BSE021443R1 TU843-3BSE021443R1 ABB TU843 3BSE021443R1 ABB TU843 3BSE021443R1 S800 I/O TU843 TU843 Redundant MTU
Technical notes
ABB TU843 3BSE021443R1 is the vertical redundant 16-channel, 50 V MTU. ABB does not publish a TU843 internal failover-time claim.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What is ABB TU843 3BSE021443R1 used for?
It provides vertical redundant field termination for the listed 16-channel, 50 V S800 I/O modules.
Which I/O modules are officially compatible with TU843?
ABB lists AI843, AO845, AO845A, DI840, DI880, DO840, DO880, and DP840. Verify the exact installed article.
Does TU843 itself guarantee a sub-millisecond failover?
No TU843-specific failover time is stated on the reviewed ABB pages. Redundancy behavior depends on the installed modules and system design.
How should the TU843 process load be calculated?
Observe 3 A maximum per channel and 10 A for the process connection, then apply the separate installed-module limits.
What should be recorded before removing TU843?
Record all terminal numbers, process-power and 0 V groups, four key positions, module labels, mounting orientation, and conductor sizes.
Can TU843 directly replace TU842?
ABB distinguishes them by mounting orientation. Perform an engineering review of the rail layout, wiring, module list, and order number.
How do I request the TU843 datasheet and quotation?
Use the verified PDF in Manuals and send Apter Power the quantity, destination, condition, module type, and required date.

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