Schneider Electric LTMR08MFM TeSys T Motor Controller 0.4-8 A

Availability status of the LTMR08MFM

The datasheet for the LTMR08MFM carries three notices: “Discontinued on: 28 Oct 2026”, “Discontinued – Service only” and “To be end-of-service on: 31 Jan 2027”. This page therefore describes a discontinued product. Support ends on the date given, and Seven Star LLC can only confirm what is actually available when you send the enquiry.

For a plant that already runs this controller the practical meaning is simple: spares and service support are time-limited. If you are planning a new installation, ask about a current replacement in the TeSys T range before committing. If you are keeping an existing panel alive, buy the spares you need while they can still be found, and record the reference and firmware you have.

What the LTMR08MFM is and what it controls

The LTMR08MFM is a Schneider Electric TeSys T motor controller, listed in its datasheet as: Motor Management, TeSys T, motor controller, Modbus, 6 logic inputs, 3 relay logic outputs, 0.4 to 8A, 100 to 240 VAC. It is the central unit of a motor management system: it measures the motor current, applies protection functions, records events and speaks Modbus to a PLC or a supervisory system. Seven Star LLC supplies the LTMR08MFM in Oman and the GCC as an independent supplier in Muscat.

Reading the reference: LTMR is the device short name and compatibility code given in the datasheet, and the title supplies the rest: Modbus, six logic inputs, three outputs, the current window and the 100 to 240 V AC supply. The 0.4 to 8 A measurement window places this controller on small and medium three-phase motors: dosing and transfer pumps, small fans and blowers, light conveyors and similar drives where a full TeSys T function set is wanted on a modest current.

Technical specifications of the LTMR08MFM

What the LTMR08MFM protects against and records

The datasheet lists these protection types for the LTMR08MFM: earth-leakage protection, load fluctuation, locked rotor, overload, overload (long time), phase failure, phase unbalance, power factor variation, reverse polarity protection, thermal overload protection, thermal protection. Thermal overload, locked rotor, phase failure and phase unbalance are the classic motor-saving functions; earth-leakage and power-factor variation take the controller beyond what a thermal relay can see.

For maintenance staff the diagnostic list is as valuable as the protection list. The controller records event recording. A trip history with context information turns a nuisance trip into something that can be explained, for example a start that was too long or an imbalance that grew over several days.

Metering covers average current iavg, temperature, earth-fault current, imbalance current, phase current i1, i2, i3 rms. Accuracy figures in the datasheet include 1 % for current, 1 % for voltage from 100 to 830 V, 3 % for power factor and 5 % for active and reactive power.

Inputs, outputs and Modbus on the LTMR08MFM

There are six logic inputs. At 100 V each draws 3.1 mA and at 240 V 7.5 mA; the datasheet guarantees state 0 from 0 to 40 V (up to 15 mA for 25 ms) and state 1 from 79 to 264 V (at least 2 mA for 25 ms).

Outputs are one normally open plus one normally closed fault signal contact and three normally open contacts. Load current is 5 A at 250 V AC or 5 A at 30 V DC; the permissible power is 480 VA (AC-15, Ie 2 A, 500 000 cycles) and 30 W (DC-13, Ie 1.25 A, 500 000 cycles), with a maximum switching frequency of 2 Hz and an operating rate of 1800 cycles per hour. The datasheet names a 4 A gG fuse for the outputs and a 0.5 A gG fuse for the control circuit.

The communication port is Modbus on a 2-wire RS 485 interface with addresses 1 to 247 and a transmission rate from 1.2 to 19.2 kbit/s. Two connection styles are listed, an RJ45 socket and a terminal block with two shielded twisted pairs. The datasheet also lists a web server under web services.

Is the LTMR08MFM the right current window?

Against the LTMR27MFM it has the same housing, the same supply, the same six inputs and the same outputs; the only substantive difference in the datasheet is the current window. The 1.35 to 27 A model covers larger motors, while this one gives a finer low end down to 0.4 A.

Choose it when the motor full-load current is below about 8 A and you want the setting to sit comfortably inside the window; a motor that draws more than 8 A cannot be protected by this reference.

• Motor nameplate current inside 0.4 to 8 A.
• Control supply 100 to 240 V AC at 50/60 Hz (limits 93.5 to 264 V AC).
• Modbus master available, or a plan to use the web server for diagnostics.
• Output contacts sized for the contactor coil within the 2 A AC-15 figure.
• Status accepted: this reference is discontinued.

Environment, standards and approvals for the LTMR08MFM

The LTMR08MFM is rated for an ambient of -20 to 60 °C in operation and -40 to 80 °C in storage, IP20, with operation up to 2000 m without derating. Pollution degree 3 and overvoltage category III are listed; surge and EMC immunity levels are given in the datasheet up to level 4 for fast transients on supply and relay outputs.

Standards named are IACS E10, IEC 60947-4-1, UL 508, EN 60947-4-1, CSA C22.2 No 14. Certifications listed for this exact reference are ABS, KERI, BV, EAC, CSA, GL, C-Tick, ATEX, UL, RMRoS, NOM, CCC, DNV, RINA, LROS (Lloyds register of shipping). Treat the list as the datasheet states it and confirm any project-specific approval, such as a marine class or a hazardous-area requirement, against the document before ordering.

Commissioning and service plan for the LTMR08MFM

Because the datasheet marks the LTMR08MFM as service-only, treat any unit you buy as a like-for-like spare for an existing system rather than the start of a new standard. Before fitting, note the Modbus address and the motor parameters configured in the controller so that a replacement can be set up identically.

If a replacement is needed on a project, send us the reference of the controller you are replacing, the expansion modules around it and the motor nameplate data. We will confirm what can be offered and say plainly if the exact reference is no longer obtainable.

Information to send with an RFQ for the LTMR08MFM

• Full reference LTMR08MFM and the quantity
• Whether it replaces an installed controller and the expansion modules in use
• Motor nameplate current, voltage and power
• Modbus master and addressing plan
• Delivery location and timing

Documents and quotation

A datasheet for this product is attached on this page. It lists the electrical, mechanical and environmental data summarised above, and it is the document to check against your own drawings.

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 is not affiliated with the manufacturer.