ALSTOM UT150-1 PID temperature controller / process control board

Introduction to ALSTOM UT150-1

The ALSTOM UT150-1 is a versatile PID Temperature Controller / Process Control Board widely utilized in industrial automation.

It is designed to receive signals from temperature sensors (such as thermocouples or RTDs) and execute precise control logic to maintain stable temperatures or process variables.

While Alstom is primarily known for power and transport, this unit is often found in the ALSPA control architecture or integrated into specialized industrial heating and HVAC systems.

It is characterized by its ability to perform high-accuracy PID (Proportional-Integral-Derivative) calculations in a compact, ruggedized form factor suitable for cabinet mounting.

Technical Parameter Table

Related Models & Same Series

The UT150 series is part of a broader family of process controllers often cross-listed with GE and Yokogawa heritage designs:

UT150-0: Base model without communication expansion.

UT150-R: Relay output version for simple heating/cooling control.

UT155 / UT170: Advanced series with larger displays and multi-loop control capabilities.

AS111 / AL132: Often used in tandem with the UT150-1 in larger ALSPA MV500 control cabinets.

Product Advantages and Features

Precision PID Algorithm: Features an “Auto-tuning” function that automatically calculates the optimal Proportional, Integral, and Derivative values for any given thermal load.

Multi-Input Support: A single board can handle various sensor types (K, J, T, E, R, S, B thermocouples and Pt100 RTDs) without needing hardware changes.

Industrial Reliability: Built with aluminum alloy casing and high-grade components to withstand the extreme temperatures and vibrations found in power plants.

Intelligent Diagnostics: Includes a “Watchdog” feature and sensor-break detection, ensuring the system fails safely if a probe is damaged.

Compact Integration: Designed for high-density DIN-rail or rack-mount installation, saving space in control panels.

Application Cases

HVAC Control: Regulating temperature in large-scale commercial building climate systems or industrial clean rooms.

Power Plant Cooling: Managing the temperature of transformer oil or lubrication systems in turbine generators.

Industrial Ovens: Used in metallurgical heat treatment and glass manufacturing where precise temperature ramps are mandatory.

Plastic Extrusion: Maintaining the melt temperature of polymers during high-speed manufacturing processes.

Installation and Maintenance

Installation

Mounting: Ensure the unit is grounded through the DIN rail or a dedicated ground terminal to prevent signal drift caused by EMI.

Wiring: Use compensation cables for thermocouples to ensure accuracy. Keep signal wires away from high-current power cables to avoid interference.

Initial Setup: Configure the input type and control range via the Modbus interface or front-panel buttons before connecting the load.

Maintenance

Calibration: Verify the accuracy of the analog inputs every 12–24 months using a certified signal generator.

Heat Dissipation: Ensure the ventilation slots are clear of dust; despite its wide temperature range, excessive heat can reduce the life of internal capacitors.

Battery/Memory Check: If the unit is used to store complex setpoints, check that the non-volatile memory is retaining data after a power cycle.

Unique Product Description

The ALSTOM UT150-1 is the “steady hand” of the process world. It excels where variables are constantly shifting, acting as an intelligent bridge that stabilizes the unpredictable.

While many controllers struggle with thermal inertia, the UT150-1’s refined PID logic anticipates changes before they occur, preventing the “overshoot” that can ruin sensitive industrial batches.

It is a legacy-grade component that remains a staple in critical infrastructure because of one simple reason: it doesn’t drift.

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