100 in stock
ABB TU843 Redundant Module Termination Unit
ABB TU843 Redundant Module Termination Unit
Brand/Manufacturer: ABB
Order Number: TU843
Type: Termination Unit
Country of Origin: Sweden
Condition: Original Brand
Lead Time: Available in stock
Payment Term: 100% TT In Advance
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In-stock & ready for fast delivery. Shipping policy.
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Description
The TU843 is a redundant Module Termination Unit (MTU) designed to provide complete and reliable installation for I/O modules in industrial control systems. It supports 3-wire connections, process power distribution, and connections to ModuleBuses and I/O modules.
General Information
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Article Number: 3BSE021443R1
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Type: Redundant
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Mounting: Vertical
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Mounting Detail (Max Temp): 55 ºC (131 ºF)
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Connection Type: Terminal block
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Voltage Rating: 50 V
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Rated Current per Channel: 3 A
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Channels: 16 I/O channels
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Single/Redundant I/O: Redundant
Compatibility
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Compatible I/O Modules:
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AI843
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AO845 / AO845A
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DI840 / DI880
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DO840 / DO880
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DP840
Process Connections
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I/O Channels: Up to 16 channels (2 terminals per channel)
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Process Power Terminals:
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4 terminals for process power
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20 terminals for process power (0 V)
Functional Description
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Supports up to 16 I/O channels with 2+2 process voltage connections.
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Each channel includes 2 I/O terminals and 1 ZP (shield) connection.
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Distributes two ModuleBuses: one to the connected I/O module and one to the next MTU.
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Generates the correct I/O module address by shifting outgoing position signals to the next MTU.
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DIN rail mounting with mechanical latch for secure attachment and grounding.
Mechanical Keying System
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Equipped with four mechanical keys (two per module) to configure for different I/O modules.
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Each key has six positions, providing 36 different configurations.
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Mechanical keying helps prevent incorrect module insertion.
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This is a mechanical-only feature and does not affect electrical functionality.
Features & Benefits
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Complete I/O installation using 3-wire field connections.
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Field power distribution integrated into the design.
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Supports 16 channels of field signal and process power connections.
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Dual ModuleBus connections for redundancy and module chaining.
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Mechanical keying prevents incorrect I/O module installation.
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DIN rail latch provides secure mounting and grounding.
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Easy vertical installation in industrial cabinets.
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Focus on Benefits:
We focus on what truly matters to industrial buyers — authentic products, reliable stock, and fast global delivery. Explore how we support your operations with trusted sourcing and expert service.
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Why You Can Trust Us:
We go beyond parts — delivering reliability, speed, and expertise trusted by industrial buyers worldwide.
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Trusted by Global Clients
Serving thousands of companies across oil & gas, power, manufacturing, and more — from Fortune 500 enterprises to local distributors.
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Uptime Is Our Priority
Downtime is costly. That’s why we ensure rapid access to critical parts, minimizing production interruptions and delays.
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Experts in Sourcing Rare Parts
Our team specializes in finding hard-to-source and obsolete components — saving you time, risk, and procurement headaches.
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One-Stop Automation Supply
We offer complete automation part solutions — PLCs, drives, sensors, HMIs, relays — with expert guidance every step of the way.
Testimonials
Fast Delivery, Excellent Quality
We’ve worked with IndustriaX Limited on several urgent orders for automation components. Their ability to provide original, factory-sealed parts with full documentation—often from in-stock inventory—has significantly reduced our downtime. The delivery is consistently fast, and their logistics team is highly responsive. IndustriaX has become one of our most trusted global suppliers for industrial spare parts.
- Sarah Johnson
We’ve worked with IndustriaX Limited on several urgent orders for automation components. Their ability to provide original, factory-sealed parts with full documentation—often from in-stock inventory—has significantly reduced our downtime. The delivery is consistently fast, and their logistics team is highly responsive. IndustriaX has become one of our most trusted global suppliers for industrial spare parts.
- Sarah Johnson
Reliable Partner for Original Parts
Finding authentic automation parts has always been a challenge, especially for discontinued models. IndustriaX Limited has impressed us with their genuine stock, clear product traceability, and prompt updates. We’ve verified their shipments against OEM specs multiple times, and the results are flawless. They’re now our preferred sourcing partner for critical systems.
- David Smith
Finding authentic automation parts has always been a challenge, especially for discontinued models. IndustriaX Limited has impressed us with their genuine stock, clear product traceability, and prompt updates. We’ve verified their shipments against OEM specs multiple times, and the results are flawless. They’re now our preferred sourcing partner for critical systems.
- David Smith
Professional Service with After-Sales Support"IndustriaX Limited doesn’t just ship products—they provide solutions. When we encountered installation issues with one of the modules, their technical team replied in less than 4 hours and provided wiring guides and troubleshooting tips. This level of post-sale support is rare in the spare parts sector. Their professionalism gives us confidence in every order."
- Emily Brown
"IndustriaX Limited doesn’t just ship products—they provide solutions. When we encountered installation issues with one of the modules, their technical team replied in less than 4 hours and provided wiring guides and troubleshooting tips. This level of post-sale support is rare in the spare parts sector. Their professionalism gives us confidence in every order."
- Emily Brown
Trusted Source for Industrial Automation Spares
We've tested multiple suppliers over the years, but IndustriaX Limited consistently stands out. Their product catalog is extensive, their team is knowledgeable, and they understand the urgency of industrial needs. With every order, we receive timely updates, fast delivery, and 100% genuine products. It’s rare to find such consistency and reliability in this field.
- Michael Anderson
We've tested multiple suppliers over the years, but IndustriaX Limited consistently stands out. Their product catalog is extensive, their team is knowledgeable, and they understand the urgency of industrial needs. With every order, we receive timely updates, fast delivery, and 100% genuine products. It’s rare to find such consistency and reliability in this field.
- Michael Anderson