Product Details
Description
The TU842 module termination unit supports redundant 24 V DC output modules like the DO840, ensuring continuous actuator control during faults or module replacement. It features shared field wiring, isolated power groups, and hot-swap capability, ideal for high-uptime, safety-critical applications in energy, water, and chemical industries.
Specifications
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Manufacturer: ABB
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Country of Origin: Estonia / Sweden
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Model Number: TU842
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Order Number: 3BSE020850R1
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Product Series: S800 I/O
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Mounting Type: Dual-slot for redundancy
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Rated Voltage: 24 V DC
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Maximum Current: 8 A per unit
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Process Connections: 16 channels (Group isolated)
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Approximate Weight: 0.55 kg
Features
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Redundancy Support: Dual-module mounting capability eliminates single points of failure for critical output loops.
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Seamless Field Wiring: Consolidates wiring for 16 channels into a single, organized terminal block for both primary and backup modules.
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Hot-Swap Performance: Internal circuitry allows for the extraction and insertion of I/O modules while the station remains under power.
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Mechanical Security: Includes individual mechanical keying for each slot to prevent the installation of incorrect module types.
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Enhanced Protection: Built-in fuse points and isolation barriers protect the ModuleBus from field-side electrical disturbances.
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.