100 in stock
ABB TB840A ModuleBus Modem
ABB TB840A ModuleBus Modem
Brand/Manufacturer: ABB
Order Number: TB840A
Type: ModuleBus Modem
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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Only genuine, factory-sealed products，Learn More.
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Refund Supported Within 30 Days, help.
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All purchases include a 1-year warranty, help.
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Description
The ABB TB840A ModuleBus Modem is part of the S800 I/O system—ABB’s comprehensive, distributed, and modular process I/O system. It communicates with parent controllers and PLCs via standard fieldbuses and provides a fiber optic interface to the Optical ModuleBus.
The TB840A is specifically used in redundant configurations, where each modem connects to separate optical ModuleBus lines but shares the same electrical ModuleBus. This setup enhances system reliability and availability.
Key Features & Benefits
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Dual Fiber Optic Ports for connection to Optical ModuleBus
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Electrical ModuleBus Interface to I/O modules
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Supports redundant I/O configurations
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Provides supervisory functions for:
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I/O ModuleBus
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Power supply monitoring
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Isolated power supply to I/O modules
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Hot-swappable for minimal system disruption
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Compatible MTUs:
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TU840: For redundant TB840/TB840A, dual ModuleBus
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TU841: For redundant TB840/TB840A, single ModuleBus
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Input power fused for protection
Application Scenarios
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Expansion beyond 12 electrical I/O modules
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Distribution of remote I/O clusters via fiber optics
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High-availability systems with redundancy needs
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Use in ABB’s HI (High Integrity) controller environments
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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