Product Details
Description
The ABB TU849 is a redundant Module Termination Unit (MTU) for the S800 I/O system, designed for intrinsically safe modules. It supports two I/O modules, providing full hardware redundancy and continuous operation in hazardous areas. The unit handles power distribution and signal routing, ensuring high availability and safe maintenance in chemical, oil, and gas applications.
Specifications
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Manufacturer: ABB
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Model Number: TU849
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Order Number: 3BSE042560R1
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Product Type: Redundant Module Termination Unit
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Configuration: Supports 2 I/O Modules
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Channel Capacity: Up to 16 channels (8 per module)
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Application: Designed for Intrinsically Safe (IS) I/O modules
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Rated Voltage: 50V DC
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Mounting: Horizontal DIN Rail
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Weight: 0.58 kg
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Terminal Type: Screw terminals for field connections
Features
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Redundant Reliability: Designed to host dual modules, ensuring that a single hardware fault does not result in a loss of process data or control.
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Hazardous Area Integration: Optimized to maintain the electrical integrity required for intrinsically safe I/O loops when paired with compatible IS modules.
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Hot-Swappable Design: Enables the extraction and replacement of one module while the partner unit continues to manage live process variables.
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Mechanical Security: Built-in keying mechanisms prevent the accidental insertion of non-compatible modules, safeguarding the field circuit and hardware.
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Clear Signal Routing: Organized terminal layout simplifies the wiring of complex 8-channel loops, reducing the risk of installation errors during commissioning.
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Robust Construction: Passive backplane architecture ensures long-term stability in demanding industrial environments with minimal maintenance requirements.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.
Mastering Wire Identification in Industrial Automation: The Power of Ferrules and Cross-Ferruling
Proper wire labeling forms the cornerstone of reliable control system installation and long-term maintenance. In complex industrial automation environments, technicians terminate thousands of conductor ends inside control panels, marshalling racks, and field junction boxes. Ferrules serve as individual tube-shaped sleeve markers slipped onto conductors before final termination. While technicians historically relied on pre-printed individual letter rings, modern control panel builders utilize automated ferrule printing machines. These thermal-transfer printers generate durable, single-sleeve heat-shrink tags directly matching approved wiring schematics, significantly accelerating cabinet assembly workflows.