ALSTOM UT150-1 Digital Temperature Controller

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The Alstom UT150-1 is a highly precise, micro-controller based 1/16 DIN temperature and process regulator. It features a universal input stage capable of directly interfacing with multiple thermocouple types, platinum resistance bulbs, or linear DC voltage inputs. Utilizing advanced PID control algorithms with integrated auto-tuning functionality, this unit eliminates thermal overshoot and stabilizes temperature control loops within power plant auxiliary systems, localized boiler lines, and industrial heat treatment processes.

From an inventory management standpoint, the UT150-1 is a critical slow-moving legacy asset. While modern alternatives exist, replacing a single failed unit with a different model often requires rewriting SCADA communication maps, altering panel cutout spacing, and retraining field operators on a new menu tree. Maintaining a dedicated buffer stock of 1–2 New Surplus units on-site serves as a vital insurance policy against unexpected system dropouts. This approach allows procurement teams to avoid the high risk profile and degraded capacitor lifespans associated with second-hand or refurbished control modules.

UT150-1

Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

1. De-energize the host panel. Lock out and tag out the main AC distribution line feeding the controller block to eliminate the risk of shock.
2. Put on a grounded, static-dissipative wrist strap before handling the replacement module to protect the internal microprocessors from ESD.
3. Label each wire connected to the rear screw terminals. Note the specific terminal numbers for input compensation leads and control loop outputs.
4. If the old unit is functional enough to display menus, step through the parameter configuration settings and record the Proportional Band (P), Integral Time (I), Derivative Time (D), and input type code (IN).

Stage 2: Removal

1. Unfasten the screw terminals on the rear of the unit and carefully pull the crimped wire lugs free from the block.
2. Squeeze the plastic mounting bracket sleeve located on the body behind the panel wall and slide it backward off the controller chassis.
3. Push the UT150-1 unit forward through the front face of the panel cutout.
4. Clean the sheet metal edge around the 45 × 45 mm square panel cutout to remove old adhesive, dust, or grease.

Stage 3: Installation (Clone & Seat)

1. Ensure the rubber watertight packing gasket is correctly positioned on the front bezel of the new UT150-1.
2. Insert the unit into the 45 × 45 mm cutout from the front of the panel.
3. Slide the plastic mounting adapter bracket from the rear over the controller body until the integrated ratchets click firmly against the back of the panel plate.
4. Land the marked wires onto the correct rear terminals according to your schematics. Secure the terminal screws to a torque value of 0.5 to 0.6 Nm.

Stage 4: Power-On & Testing

1. Apply 100-240 V AC power to terminals 1 and 2. Verify that the dual displays light up immediately and run through their initialization check.
2. Navigate to the setup menu and set the input parameter (IN) to match your field sensor type (e.g., set to 1 for a Type K Thermocouple).
3. Verify that the upper red LED display indicates a realistic ambient Process Value (PV) reading without flashing an error code like oFL (sensor open/burnout).
4. Enter the required target Setpoint (SP) using the front membrane keys. Initiate an Auto-Tune (At) cycle during the initial batch run to allow the PID algorithms to calibrate to the thermal properties of your system.

Firmware/Software Versions & Upgrade Notes

The Alstom UT150-1 is an embedded firmware device where the operating logic is permanently burned onto an internal EEPROM during manufacturing.

• Hardware Parameter Codes: Be aware that variations in suffix codes (e.g., UT150-VN vs. UT150-RN) signify different physical output hardware configurations, such as a voltage pulse for external Solid State Relays versus a physical mechanical relay contact output. These versions cannot be updated or altered via software changes.
• Replacement Warning: Always check the exact suffix code on your active schematics prior to a physical swap. Mounting a voltage-pulse unit into a loop wired directly for a mechanical relay will prevent the heating contactor from picking up, resulting in a continuous zero-output state.

Frequently Asked Questions (FAQ)

Is this Alstom UT150-1 controller a brand new component or a used pull?

This is a genuine, 100% Brand New Surplus unit. It has never been installed in a live control panel, used for field operations, or subjected to industrial heat cycles. The chassis, display lens, and rear terminal blocks are in pristine factory condition. All units undergo rigorous quality control testing prior to shipment to ensure complete operational readiness.

Why should I choose this New Surplus unit over a cheaper refurbished alternative?

Refurbished process controllers are typically exposed to years of continuous high-temperature exposure inside sealed electrical enclosures. This exposure degrades the internal electrolytic smoothing capacitors and compromises the precision of the analog-to-digital converters. Buying a certified New Surplus module ensures you get a clean component with zero operational hours, providing a 10–15 year lifecycle compared to the high failure risk of a used asset.

What does a flashing “oFL” code mean on the display immediately after installation?

The oFL or “Overflow” error signal indicates an open sensor loop or input range violation. This code occurs if a thermocouple wire is broken, a terminal connection is loose, or if the internal software input parameter (IN) does not match the type of sensor physically wired to the rear terminal block.

Does this controller require a backup battery to retain its parameter settings during a plant blackout?

No. The UT150-1 uses non-volatile EEPROM memory to store all configuration parameters, PID constants, and alarm thresholds. If the facility loses main auxiliary power, all entered values are retained indefinitely without needing an internal battery. The controller resumes normal tracking immediately when power returns.

Can this unit be used for both cooling and heating control loops?

Yes. The controller can be configured for direct action (cooling) or reverse action (heating) by adjusting the control action parameter (CtL) in the internal setup menu. This flexibility allows the module to regulate standard resistive heating elements or manage cooling water solenoid loops.

What type of warranty applies to this surplus asset?

This Alstom UT150-1 unit comes with a full 1-year warranty from the date of supply. If any hardware faults or component anomalies occur during standard operation within this timeframe, the asset is fully covered, protecting your facility against early failures.