Replacing LTMT Main Unit, LTMTCT/LTMTCTV Sensor Module, and LTMT Expansion Unit - TeSys Tera Motor Management System

Overview

Questions to consider in advance of replacing either an LTMT main unit, LTMTCT/LTMTCTV sensor module or an LTMT expansion unit are:

Is the replacement device the same model as the original?
Have the configuration settings of the LTMT main unit been saved, and are they available to be transferred to its replacement?
Do we have to check the firmware of modules too?

Make sure that the three-phase power supply is turned off before replacing either the LTMT main unit, LTMTCT/LTMTCTV sensor module or the LTMT expansion unit.

Replacing the LTMT Main Unit

The time to plan for the replacement of an LTMT main unit is:

When the LTMT main unit settings are initially configured, and
Any time that one or more of its settings are subsequently re-configured

Because setting values may not be accessible when the LTMT main unit is replaced. For example, in case of device hardware detected failure, you should create a record of setting values whenever they are made.

Using the TeSys Tera DTM Library, all of the LTMT main unit configured settings, except for date and time, can be saved to a file. Once saved, you can use the TeSys Tera DTM Library to transfer these settings either to the original LTMT main unit or to its replacement.

NOTE: Only configured settings are saved. Historical statistical data is not saved, and therefore cannot be applied to a replacement LTMT main unit.

For more information on FDR, refer to TeSys Tera Motor Management System LTMTCUF Control Operator Unit User Guide – DOCA0233EN.

For information on how to use the TeSys Tera DTM Library to create, save and transfer configuration setting files, refer to the TeSys Tera Motor Management System DTM Library Online Help Guide – DOCA0275EN.

Replacing the LTMTCT/LTMTCTV Sensor Module

The primary consideration in replacing an LTMTCT/LTMTCTV sensor module, is to replace it with the same model as the original.

Replacing the LTMT Expansion Unit

The primary consideration in replacing an LTMT expansion unit, is to replace it with the same model, 24 Vdc or 100-240 Vac, as the original.

Retiring Devices

Both the LTMT main unit and the LTMT expansion unit contain electronic boards that require particular treatment at the end of their useful life. When retiring a device, be sure to observe all applicable laws, regulations, and practices.