Schneider Electric LUCM18BL TeSys Ultra Multifunction Control

LUCM18BL multifunction control unit for TeSys Ultra starters

The LUCM18BL is a Schneider Electric product listed in the datasheet as: Multifunction control unit, TeSys Ultra, 4.5A to 18A, 1P/3P motors, protection & diagnostic, class 5-30, coil 24VDC. The LUCM18BL is the multifunction control unit of the TeSys Ultra starter. It plugs into a power base and provides motor protection with adjustable class, diagnostics and a serial interface, instead of the fixed behaviour of the standard units. Seven Star LLC supplies the LUCM18BL in Oman and the GCC as an independent supplier based in Muscat.

Reading the reference: LUC marks a TeSys Ultra control unit, M the multifunction type, 18 the 18 A top of the current range and BL the 24 V DC coil. The datasheet gives the adjustable current range as 4.5 to 18 A.

Technical specifications of the LUCM18BL

Protection range and information provided by the unit

Motor current adjustment range: 4.5 to 18 A. Thermal overload class: Class 5 to 30 50 to 60 Hz -25 to 55 °C IEC 60947-6-2; Class 5 to 30 50 to 60 Hz -25 to 55 °C UL 508. Short-circuit trip threshold: 14.2 x Ir ± 20 %. Main functions: Manual or automatic reset; Protection function alarm; Protection against phase failure and phase imbalance. Communication interface: RS485 multidrop RJ45 front panel Modbus RTU 19200 bit/s. Information displayed: Average current factory setting; Average current settable; Cause of last 5 faults settable; Current in phase settable.

A multifunction unit goes beyond a thermal trip. It records motor load, tripping history and the cause of a stop, and provides parameters through a front RS485 connection. This lets a maintenance engineer read the cause of a nuisance trip rather than guessing.

Compatible bases and the place of the LUCM18BL in a starter

The datasheet lists the power bases that accept the unit (LUB and related types); the base decides the frame, short-circuit rating and reversing. A base such as LUB12 would carry a lower current than this unit can adjust to, so the base current limits the useful range.

On the control side the unit takes 24 V DC and can be run from a PLC or from a communication module. For networking, add the appropriate communication module (Modbus and others, per the datasheet).

The datasheet downloaded for this page carries lifecycle notices: Discontinued on: Jul 2, 2025. For a plant that already runs this reference that makes the LUCM18BL a spare-and-replacement item, and it is worth fixing the stock level and the long-term successor plan at the same time. We can discuss compatible alternatives once we know the installation.

Selection checklist for the LUCM18BL

• Motor current falls inside 4.5 to 18 A and the base is of equal or higher rating.
• Overload class (5 to 30) suits the starting time of the load.
• 24 V DC supply and its current margin.
• Whether serial or fieldbus data are needed.
• Language of the display and the parameters that must be reachable.
• Lifecycle: the datasheet carries a discontinuation notice, so plan the replacement path.

Setting up and servicing the LUCM18BL

Plug the unit into the power base until it locks, set the motor current and class with the front keys, and set the reset mode (manual or automatic, with the time before reset). Test the trip function by simulating a fault with the current-injection method recommended in the manual.

If the unit is replaced, copy the parameters from the old unit or keep a record of them: motor current, class and communication address. A replacement can be fitted live-off only; de-energise the starter first.

Typical applications of the LUCM18BL in Oman and the GCC

This unit is used where a motor needs more monitoring than a bimetal relay: process pumps, compressors, extruders and fans in the region. The ability to set a class from 5 to 30 matters for loads with long accelerating times such as high-inertia fans.

Dimensions, environment and approvals of the LUCM18BL

For the LUCM18BL, plan the mounting space from the datasheet: 45 mm (W) x 66 mm (H) x 60 mm (D). The LUCM18BL weighs 0.175 kg. Mounting, derating and enclosure choices follow the environmental data below, which should be compared with the actual panel temperature and the dust and humidity of the site in Oman and the GCC.

Ambient temperature limits in the datasheet: -25 to 60 °C. Ingress protection: IP20 front panel and wired terminals IEC 60947-1; IP20 other faces IEC 60947-1; IP40 front panel outside connection zone IEC 60947-1. Operating altitude: 2000 m. Vibration resistance: 2 gn 5 to 300 Hz power poles open IEC 60068-2-6; 4 gn 5 to 300 Hz power poles closed IEC 60068-2-6. Shock resistance: 10 gn power poles open IEC 60068-2-27; 15 gn power poles closed IEC 60068-2-27. Standards listed: EN 60947-6-2; IEC 60947-6-2; UL 60947-4-1, with phase barrier; CSA C22.2 No 60947-4-1, with phase barrier. Certifications listed for this reference: CE; UL; CSA; CCC; EAC; ASEFA; ATEX; Marine.

Information to send with an RFQ for the LUCM18BL

• Full reference and quantity required
• Existing equipment, panel or rack it must fit
• Supply voltage, load or signal details of the application
• Required delivery location and timing
• Whether a spare, a replacement or a new installation

Documents and quotation

A datasheet for this product is attached on this page. It lists the electrical, mechanical and environmental data summarised above.

Send us the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and does not represent itself as an official channel of the manufacturer.