LT304

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The LT304 is a servo amplifier developed by Bosch Rexroth Indramat. A member of the LTE Servo Amplifiers series, it features an output voltage range of 0 to 230 VAC and supports motor rotational speeds up to 20,000 min−1. The amplifier has a maximum current rating of 28 amps and weighs 2.7 kg.

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Product Description:

The LT304 is a Drive Controller from Bosch Rexroth's Indramat series, designed for motor control in industrial automation systems. It is engineered to handle motor speeds of up to 20,000 min⁻¹ and offers a wide range of voltage and frequency adjustments. The LT304 ensures reliable and efficient operation in demanding environments.

The LT304 drive controller operates with an intermediate circuit voltage of 280 VDC to 370 VDC and uses a control voltage of +24 V and a processor voltage of +5 V. This drive controller can deliver three-phase output voltage from 0 to 230 VAC, with an output frequency range of 0 Hz to 667 Hz. It features advanced interference suppression and a protection class of IP20. It also provides an output current of 11 A, with a nominal current of 7 A, and can have a maximum current of 28 A. It has a nominal power rating of 1,600 VA, making it suitable for various motor control tasks. The LT304 drive controller supports a maximum cable length of 100 meters for the motor, ensuring flexibility in system design. It also complies with EN 55011 Class A for interference suppression, minimizing electromagnetic disturbances in operations.

The LT304 drive controller is designed to work within ambient temperatures of 0 to 55 °C, provided a ventilator is used, and can be stored within a temperature range of –20 °C to 70 °C. Its IP 20 protection classification ensures safe handling, protecting against accidental contact. This drive controller is built to meet the needs of modern automation systems that require precise control, flexibility in setup, and robust protection against environmental factors. Its technical features and reliability make it a valuable component in many motor control applications.

Ambient Temperature (allowed)
0 to 55 °C with ventilator
Control Voltage
+24 V
Interference Suppression
EN 55011 Class A (industrial range)
Intermediate Circuit Voltage
280 VDC to 370 VDC
Maximum Cable Length To Motor
100 m
Maximum Current
28 A
Motor Rotational Speed
20,000 min−1
Nominal Current
7 A
Nominal Power
1,600 VA
Output Current
11 A
Output Frequency
0 Hz to 667 Hz
Output Voltage (three-phase)
0 to 230 VAC
Processor Voltage
+5 V
Protection Classification
IP 20 (protection against accidental contact)
Storage Temperature
–20 °C to 70 °C

Frequently Asked Questions about LT304:

Q: How does interference suppression benefit the LT304?

A: Interference suppression in the LT304 Drive Controller minimizes electromagnetic disturbances, ensuring stable motor operations and compliance with industrial standards.

Q: Why does the LT304 support 0–667 Hz output frequency?

A: The LT304 Drive Controller (product code: LT304) supports 0–667 Hz to ensure precise speed control for high-performance motors in dynamic applications.

Q: What is the purpose of advanced interference suppression in LT304?

A: The LT304 (product code: LT304) uses advanced interference suppression to maintain signal integrity, improving reliability in electronically noisy environments.

Q: Why is IP20 protection used in the LT304?

A: The LT304 Drive Controller’s IP20 protection prevents accidental contact with live parts, enhancing safety during installation and maintenance tasks.

Q: Why does the LT304 have a 100m cable limit?

A: The LT304 Drive Controller supports up to 100m motor cable to provide flexible installation without compromising signal quality or motor performance.


Internal Product Review

  • ‘‘The LT304 Drive Controller by Bosch Rexroth excels in industrial automation with features like a nominal current of 7 A, output voltage up to 230 VAC, and advanced interference suppression. Its flexibility with 100-meter motor cables and IP20 protection ensures dependable, high-performance motor control.’’

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