NTU-7I6 ABB Bailey

Product Dimensions：

The NTU-7I6 acts as a bridge, routing field signals through specialized cables to INFI 90 digital input modules such as the IMDSI series. It is designed to handle discrete state signals, typically categorized into different voltage variants such as the NTU-7I6/24S1 (optimized for 24 VDC) and the NTU-7I6/48S1 (optimized for 48 VDC). The unit is usually mounted on a standard termination unit mounting bracket in the rear of a Cabinet or on a rack. It features built-in protection and filtering to mitigate industrial noise, ensuring that only valid state changes are reported to the controller.

Product Parameters

• Product Family: ABB Bailey INFI 90 / Net 90 / Symphony Plus

• Module Type: Digital Input Termination Unit (NTU)

• Signal Type: Discrete/Digital Inputs (Dry contacts or powered binary signals)

• Input Voltage Levels: Typically available in 24 VDC or 48 VDC versions (indicated by suffix)

• Channel Capacity: Generally supports 16 or 32 digital input channels depending on the specific configuration and connected slave module

• Physical Dimensions: Approximately 17.8 cm x 2.5 cm x 17.8 cm (7.0 in x 1.0 in x 7.0 in)

• Weight: Approximately $0.3 \text{ kg}$ ($0.66 \text{ lbs}$)

• Mounting: Standard Bailey termination unit mounting frame

• Isolation: Optical or galvanic isolation provided when used with compatible slave modules to protect the control logic from field surges

Product Advantages

• Robust Connectivity: The screw-terminal design provides a highly reliable and vibration-resistant connection point for heavy-duty industrial field wiring.

• Simplified Maintenance: By separating field wiring from the active electronic modules, the NTU-7I6 allows for module replacement without disturbing the permanent plant cabling.

• Noise Immunity: The unit is engineered to filter out electromagnetic interference (EMI) and radio frequency interference (RFI), which are common in power plants and industrial environments.

• System Scalability: It facilitates the easy expansion of digital I/O points within the INFI 90 ecosystem, allowing users to add capacity by simply adding units and cabling.

Important Considerations (Precautions)

• Voltage Matching: Ensure the field signal voltage (e.g., 24V or 48V) matches the specific NTU-7I6 variant being used to avoid damaging the module or causing signal failure.

• Power Safety: Always disconnect power to the termination unit and associated I/O modules before performing any wiring or maintenance to prevent accidental shorts or electric shock.

• Cable Integrity: Use only genuine ABB Bailey "Y-cables" or specified interface cables to connect the NTU to the controller slave modules to ensure proper pin mapping and signal integrity.

• Environmental Limits: The unit should be installed in a climate-controlled cabinet that meets the specified temperature and humidity ranges, as extreme heat can degrade the life of internal filtering components.

• Firmware/Module Compatibility: Verify that the NTU-7I6 is compatible with the specific version of the Digital Input Slave Module (IMDSI) currently installed in your rack.

We have the same series of models in stock.  If you don't find the model you need, please contact us and we will provide you with an official quotation！

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