ABB TU811V1 Terminal Unit Base

Description

ABB TU811V1 Terminal Unit Base

The ABB TU811V1 is a high-reliability Compact Termination Unit (MTU) designed for the S800 I/O system. It serves as the physical and electrical interface between field wiring and the S800 I/O modules, providing a neat, secure, and space-saving connection solution in industrial automation cabinets.

Product Detailed Description

The TU811V1 is a compact module termination unit intended for single (non-redundant) configurations. It allows for the direct connection of process signals via screw terminals. The unit features a passive backplane design, meaning it routes signals and power but does not contain active electronic processing components; instead, it hosts the active S800 I/O module which plugs directly onto it.

The TU811V1 supports a variety of 24 V DC I/O modules, including digital inputs, digital outputs, and analog signals, depending on the specific module fitted.

Technical Parameters

Product Advantages

• Compact Design: Saves significant cabinet footprint compared to extended termination units, allowing for higher density I/O configurations.
• Easy Maintenance (Hot-Swapping): The design allows the active I/O module to be plugged in or removed without disrupting the field wiring connected to the TU811V1 terminals.
• Mechanical Keying: Features built-in mechanical keys that prevent the wrong type of I/O module from being inserted into the termination unit, protecting hardware from accidental voltage mismatches.
• Robust Connectivity: Heavy-duty screw terminals ensure long-term, vibration-resistant connections for field instruments.

Important Considerations & Precautions

• Shunt Rating Limits: Pay close attention to the total current limit (8 A per MTU). Exceeding this total continuous current can overheat the internal copper bus of the termination unit.
• Module Compatibility: While versatile, the TU811V1 is designed for 24 V systems. Ensure it is not paired with high-voltage AC I/O modules (like 120V/230V AC modules), which require different termination units (e.g., TU812).
• Tightening Torque: Ensure screw terminals are tightened to the manufacturer’s specification (0.5 Nm) to prevent loose connections or stripping the threads.
• Grounding: The DIN rail used for mounting must be properly bonded to the functional earth of the cabinet to ensure correct shielding and noise immunity.

Product Applications

The TU811V1 is utilized wherever the S800 I/O system is deployed, typically alongside ABB Ability™ System 800xA or AC 800M controllers:

• Process Control Cabinets: Distributed I/O stations in chemical, oil and gas, and pharmaceutical plants.
• Power Generation: Marshalling cabinets for turbine control, water treatment, and auxiliary plant monitoring.
• Factory Automation: Centralized integration of field sensors, solenoid valves, and motor starters back to the main PLC rack.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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