Product Details
Description
The TU843 3BSE021443R1 is a passive interface that integrates two redundant ModuleBus communication paths, eliminating single points of failure between field I/O and the AC 800M controller. It features dedicated terminal points for dual 24V DC power inputs, ensuring power redundancy alongside data redundancy. With no active electronics, the TU843 maintains system reliability. Its rugged, DIN-rail mountable housing includes mechanical keying to prevent incorrect module installation, making it ideal for high-density DCS environments requiring process continuity and fault tolerance.
Specifications
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Manufacturer: ABB
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Model Number: TU843 (3BSE021443R1)
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Product Type: Redundant Module Termination Unit
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Module Support: Dual CI810 or CI820 Interfaces
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Maximum Rated Voltage: 30 V DC
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Maximum Rated Current: 5 A
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Connection Logic: Redundant ModuleBus
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Mounting Method: 35mm DIN Rail
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Protection Class: IP20
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Operating Temperature: -25 to +70 °C
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Weight: 0.53 kg
Features
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Redundancy-Ready Design: Specifically engineered to support two communication modules, enabling seamless failover and high system availability.
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Dual Power Input Terminals: Accommodates two independent power sources to provide redundant electrical supply to the I/O cluster.
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Zero-Downtime Maintenance: Supports the hot-swapping of communication interfaces, allowing for module replacement while the control system remains live.
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Passive Reliability: The hardware-centric backplane design ensures a high Mean Time Between Failures (MTBF) by removing active electronic failure points.
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Secure Mechanical Keying: Includes physical coding pins to ensure that only compatible hardware can be seated, preventing damage from electrical mismatch.
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Compact Cabinet Routing: Consolidates redundant bus routing and power distribution into a single, space-efficient DIN rail unit.
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
Redundant Automation Systems: Core Architecture, Business Value, and Technical Advantages
Unplanned downtime poses a major financial threat to process manufacturing. To prevent costly interruptions, engineers deploy redundant PLC and DCS architectures that ensure continuous operation when hardware fails. This technical guide explores redundancy principles, critical system nodes, and real-world scenarios.
Preventing Emergency Stop Spurious Trips in Industrial Control Systems
Emergency Stop pushbuttons use Normally Closed contacts for fail-safe safety, but mechanical wear can cause costly spurious trips. This technical guide examines E-Stop contact failure root causes, redundant hardware setups, PLC logic monitoring, and maintenance strategies to maximize plant availability.
Why 24V DC Is the Universal Standard for Industrial Automation Power Supplies
Industrial manufacturing requires continuous uptime to prevent equipment damage. Unlike AC power, 24V DC circuits seamlessly integrate with UPS units and battery banks. During main grid failures, a 24V DC backup system instantly maintains PLC memory, instrument loops, and critical safety valves without interruption.