Overview

The ABB Bailey NTU‑7UO (NTU7UO) and NTU‑7U0 (NTU7U0) are termination units designed to handle analog input/output signals in ABB’s Infi‑90 DCS.

These modules provide electrical isolation between field devices and the control system, preventing interference and ensuring accurate signal transmission.

They are widely used in process industries, power generation, and utilities, where precise analog measurements (temperature, pressure, flow, level) must be transmitted without distortion or noise.

Technical Specifications

Key Features

• Electrical isolation prevents ground loops and interference

• Supports 4–20 mA and voltage signals for analog measurement

• Reliable termination design for long-distance field wiring

• Compact and rugged construction for industrial environments

• Ensures signal accuracy in sensitive analog measurements

Typical Applications

• Process industries: Chemical, oil & gas, and pharmaceutical plants

• Power generation & utilities: Substation and plant monitoring

• Manufacturing automation: Production line analog signal interfacing

• Infrastructure systems: Water treatment and transportation automation

FAQ

Q1: What is the primary function of the NTU‑7UO / NTU‑7U0?
A1: They provide isolated analog signal termination for ABB Bailey Infi‑90 systems.

Q2: What signals are supported?
A2: They support 4–20 mA current loops and voltage signals.

Q3: Why is isolation important?
A3: Isolation prevents ground loops, EMI, and signal distortion, ensuring accurate measurements.

Q4: What are typical applications?
A4: Used in process control, power generation, and industrial automation for analog measurements.

Q5: Are NTU‑7UO and NTU‑7U0 interchangeable?
A5: Yes, both serve similar roles as isolated analog termination units within the Infi‑90 DCS.