Wiring Diagram of LTMT Main Units Installed in an Enclosure

Overview

This section describes the connection of LTMT main units installed in an enclosure to the RS 485 bus via open-style connectors. Daisy chain connection is not possible when using the HMI port.

Precautions

Always follow the recommendations for wiring and connection.

WARNING
UNINTENDED EQUIPMENT OPERATION This equipment must be installed, programmed, and serviced only by qualified personnel. Follow all up-to-date instructions, standards and regulations. Check the function settings before starting the motor. Do not downgrade or modify these devices. Incorrect configuration can result in unpredictable behavior of the devices. Respect all the wiring and grounding rules in order to avoid communication malfunctions due to EMC disturbance. Failure to follow these instructions can result in death, serious injury, or equipment damage.

WARNING

UNINTENDED EQUIPMENT OPERATION

This equipment must be installed, programmed, and serviced only by qualified personnel.

Follow all up-to-date instructions, standards and regulations.
Check the function settings before starting the motor.
Do not downgrade or modify these devices.

Incorrect configuration can result in unpredictable behavior of the devices.

Respect all the wiring and grounding rules in order to avoid communication malfunctions due to EMC disturbance.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

LTMT Main Units Installed in an Enclosure

The wiring diagram for the connection of LTMT main units installed in an enclosure to the RS 485 bus via open-style connectors is as follows:

Installation Rules in a Switchboard

The installation of the LTMT main unit in the withdrawable drawer of a switchboard contains constraints specific to the type of switchboard:

For installation of the LTMT main unit in a Schneider Electric Okken switchboard, refer to the Okken Communications Cabling & Wiring Guide (available on request).
For installation of the LTMT main unit in a Schneider Electric BlokSeT switchboard, refer to the BlokSeT Communications Cabling & Wiring Guide (available on request).
For installation of the LTMT main unit in a Schneider Electric Model 6 switchboard, refer to the Model 6 Communications Cabling & Wiring Guide (available on request).
For installation of the LTMT main unit in other types of switchboard, follow the specific EMC instructions described in this guide and refer to the relative instructions specific to your type of switchboard.

Modbus RTU Accessories

The table lists the Modbus RTU accessories.

Designation	Description	Reference Number
Line terminator for open-style connector	R = 120 Ω	–