How to Use Movitrac LTE-B+: Examples, Pinouts, and Specs

The Movitrac LTE-B+ is a versatile frequency inverter manufactured by SEW (Part ID: MCLTEB0015-2B1-4-00). It is designed for controlling three-phase AC motors, offering advanced features such as energy efficiency, precise speed control, and robust communication options. This component is ideal for applications requiring reliable motor control in industrial environments.

• Conveyor systems in manufacturing plants
• Pump and fan control in HVAC systems
• Material handling equipment
• Energy-efficient motor control in industrial automation
• Speed and torque control for three-phase motors

The Movitrac LTE-B+ features a terminal block for wiring connections. Below is the pin configuration:

1. Power Connection: Connect the AC power supply to the L and N terminals. Ensure the PE terminal is properly grounded for safety.
2. Motor Connection: Connect the three-phase motor to the U, V, and W terminals.
3. Control Wiring: Use the control terminals to connect external devices such as switches, sensors, or a PLC. For example:
   • Connect a Start/Stop switch to DI1.
   • Use AI1 for speed control via a potentiometer or analog signal.
4. Communication Setup: If using Modbus RTU, connect the RS485+ and RS485- terminals to the communication network.
5. Parameter Configuration: Use the built-in keypad or software to configure parameters such as motor type, speed range, and control mode.

• Ensure the input voltage matches the specified range (200–240 V AC).
• Use proper cable shielding and grounding to minimize electrical noise.
• Avoid exceeding the rated power and current limits to prevent damage.
• Regularly inspect and clean the inverter to ensure proper ventilation and cooling.
• For safety, always disconnect power before performing any wiring or maintenance.

The Movitrac LTE-B+ can be controlled via Modbus RTU using an Arduino UNO. Below is an example code snippet:

#include <ModbusMaster.h>

// Create ModbusMaster object
ModbusMaster node;

void setup() {
  Serial.begin(9600); // Initialize serial communication
  node.begin(1, Serial); // Set Modbus slave ID to 1

  // Configure digital pin for Start/Stop control
  pinMode(7, OUTPUT);
  digitalWrite(7, LOW); // Ensure motor is stopped initially
}

void loop() {
  // Example: Set motor speed to 50% (assuming 0–100% range)
  uint16_t speedValue = 500; // 50% of max speed (scaled to 0–1000)

  // Write speed value to Modbus register (e.g., register 0x2000)
  uint8_t result = node.writeSingleRegister(0x2000, speedValue);

  if (result == node.ku8MBSuccess) {
    Serial.println("Speed set successfully!");
  } else {
    Serial.println("Failed to set speed.");
  }

  delay(1000); // Wait for 1 second before next operation
}

Note: Ensure the Modbus register addresses match the Movitrac LTE-B+ documentation. Use a suitable RS485-to-TTL converter to connect the Arduino to the inverter.

1. Inverter Does Not Power On

   • Cause: Incorrect wiring or no power supply.
   • Solution: Verify the AC input voltage and check the wiring connections.

2. Motor Does Not Start

   • Cause: Incorrect parameter settings or control signal missing.
   • Solution: Check the Start/Stop signal on DI1 and verify motor parameters.

3. Overload or Overcurrent Fault

   • Cause: Motor is drawing excessive current.
   • Solution: Ensure the motor is not overloaded and check for short circuits.

4. Communication Failure

   • Cause: Incorrect RS485 wiring or settings.
   • Solution: Verify the RS485 connections and ensure the baud rate and slave ID match.

• Q: Can the Movitrac LTE-B+ control single-phase motors?
  A: No, it is designed for three-phase AC motors only.

• Q: How do I reset the inverter to factory settings?
  A: Refer to the user manual for the specific parameter reset procedure.

• Q: What is the maximum cable length for RS485 communication?
  A: The maximum recommended length is 1200 meters, depending on the baud rate and cable quality.

• Q: Can I use the Movitrac LTE-B+ outdoors?
  A: No, the inverter has an IP20 protection class and must be installed in a dry, indoor environment.

By following this documentation, users can effectively integrate and operate the Movitrac LTE-B+ in their applications.