ABB NTU7UO Isolated Analog Output Terminal Unit

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Product Overview

The ABB NTU7UO Isolated Analog Output Terminal Unit is a key component used in ABB Network 90, INFI 90, or DCS systems.
It provides isolated analog output channels that convert control signals into standard voltage or current outputs (such as 0–10 V or 4–20 mA) for driving actuators, positioners, or variable frequency drives.
With high-precision isolation and robust design, the NTU7UO ensures reliable, noise-free, and accurate analog signal transmission in demanding industrial environments.

Main Functions

• Provides isolated analog output channels

• Converts control signals to standard current or voltage outputs

• Enables safe connection with field actuators

• Electrically isolates control and field circuits to prevent interference or damage

Technical Specifications

Features & Advantages

1. High precision and stability – Excellent linearity and minimal temperature drift.

2. Full channel isolation – Independent isolation prevents ground loops and signal coupling.

3. Flexible signal output – Supports both voltage and current output configurations.

4. Strong EMI resistance – Built-in optical isolation and filtering for harsh industrial environments.

5. Modular construction – Easy installation, replacement, and system expansion.

6. Status indication and diagnostics – LED indicators for real-time monitoring and troubleshooting.

Typical Applications

• Analog signal output in process control systems

• Control of actuators, valves, and frequency converters

• Automation in chemical, metallurgical, power, and water industries

• Signal isolation and system protection in DCS environments

Installation & Operation Notes

1. Install in a dry, ventilated control cabinet.

2. Use shielded twisted-pair cables for analog signals.

3. Maintain proper grounding to prevent drift.

4. Use ESD protection when handling the module.

5. Periodically inspect terminal connections and signal stability.

The structure and details of the product：

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