LD75D4 MITSUBISHI

LD75D4 MITSUBISHI Power Supply

Brand：MITSUBISHI Model number：LD75D4

Country of origin: Japan Product weight：0.55kg

HS code：8517623990

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Product Details：

Product Dimensions：

The LD75D4 is a 4-axis positioning module that utilizes a differential driver output method for pulse train positioning. It offloads complex positioning calculations from the main CPU, ensuring deterministic, high-speed execution of motion profiles. The module supports a wide variety of control modes, including point-to-point positioning, linear interpolation, circular interpolation, and speed-position switching control. Configuration and programming are streamlined using the GX Works2 or GX Works3 software suite, which provides dedicated positioning data setting screens and monitoring tools, eliminating the need for complex ladder logic to handle basic motion profiles.

Product Parameters

Module Type: Positioning Module (MELSEC-L Series)
Number of Control Axes: 4 axes
Output Type: Differential driver (pulse train output)
Maximum Output Pulse: 4,000,000 pulses per second (4 Mpps), which allows for high-speed operation with high-resolution encoders.
Maximum Connection Distance: Up to $10 \text{ meters}$ between the module and the drive when using standard differential wiring.
Positioning Data: Supports up to 600 positioning data points per axis (such as operation pattern, control system, positioning address, and command speed).
Interpolation Functions: 2-axis, 3-axis, or 4-axis linear interpolation, and 2-axis circular interpolation.
Starting Time: Extremely fast response time, typically around $0.1 \text{ ms}$ to $0.2 \text{ ms}$ depending on the number of axes being started simultaneously.
External I/O Interfaces: Dedicated inputs for upper/lower limit switches, proximity dog signals, stop signals, and drive ready/deviation counter clear signals.

Product Advantages

A major advantage of the LD75D4 is its High-Speed Pulse Output, which ensures that the module can maximize the performance of modern, high-resolution servo systems without becoming a bottleneck. The Differential Driver Interface provides superior noise immunity compared to open-collector outputs, allowing for longer cable runs and reliable operation in high-EMI industrial environments.

The Advanced Interpolation Capabilities enable the module to execute complex multi-axis geometric paths seamlessly, which is vital for applications like gluing, cutting, or routing. Furthermore, the Intelligent Functions Feature allows users to set up complex speed profiles (such as S-curve acceleration and deceleration) directly within the parameters, significantly reducing engineering time and smoothing mechanical transitions to reduce equipment wear.

Important Considerations and Precautions

When installing and wiring the LD75D4, strict attention must be paid to Noise Countermeasures. Because pulse train signals are high-frequency, the wiring must be kept physically separate from high-voltage AC power lines and motor cables to prevent cross-talk and lost pulses. Always use Twisted-Pair Shielded Cables for the differential connections and ensure the shield is grounded properly.

It is critical to verify the External Limit Switch Functions before operating the system; if the upper or lower stroke limits are incorrectly wired or disabled in the parameters, the machinery could experience a mechanical crash during commissioning. Technicians must also ensure that the Drive Error Response is correctly linked to the module's stop input so that the module ceases pulse generation instantly if a servo drive trips. Finally, note that the module relies on the system backplane power, so ensure the power supply module of the MELSEC-L rack has sufficient current capacity to support the LD75D4 along with other expansion units.

Product Applications

The Mitsubishi LD75D4 is widely deployed in automated machinery requiring multi-axis independent or coordinated movement.

Packaging Machinery: Controlling indexing tables, high-speed wrapping axes, and smart conveyor feeding gates.
Pick-and-Place Robots: Powering Cartesian coordinate robots used for component transferring, palletizing, and sorting.
Material Handling Systems: Managing precise position feedback for automated storage shuttles and lifters.
Assembly Automation: Driving the multi-axis pressing, screwing, and component insertion stations on automated assembly lines.
Textile and Printing Machines: Controlling precise feed rates and tension management where speed-to-position switching is required.

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