The Mitsubishi LE-30CTA is an automatic tension controller designed for high-performance unwinding, intermediate, and rewinding processes. 1. Core Functions & Compatibility

Automatic Control: It processes signals from tension detectors (like the LX-TD or LX-TD-928 series) to maintain constant tension in materials such as paper, film, and wire. Output Versatility:

Generates a 0–24V DC control voltage for magnetic particle or hysteresis clutches and brakes.

Outputs a 0–5V DC torque command voltage for AC servo amplifiers.

Replacement Notice: Production for the LE-30CTA was discontinued as of March 2024. The official successor model recommended by Mitsubishi Electric is the LE7-40GU-L. 2. Technical Specifications Feature Power Input I/O Points 32 input/output mixed points Output Type Transistor output (source type) Rated Output Voltage DC 12V to 24V Max Load Current 0.1A per point 3. Installation & Safety Guidelines

Mounting: The unit is "open type" equipment and must be installed inside a shielded conductive control box to ensure safety and minimize electrical noise.

Wiring: Maintain at least 100mm (3.94") of separation between control lines and high-power lines to prevent signal interference.

Grounding: Perform single-point grounding on the controller side of the shielded cable. Manual Resources

While a direct PDF download for the exact "CTA" suffix is often found in consolidated catalogs, the LE-30CTN Instruction Manual on Scribd or the LE-30CTN Application Manual via Contentstack covers the core operations and wiring for this series.

If you are looking to replace a broken unit or set up a new system, I can: Find stock availability for the discontinued LE-30CTA.

Provide detailed wiring diagrams for specific detector types.

Help you compare the LE-30CTA with its successor, the LE7-40GU-L. Which of these would be most helpful for your project? LE-30CTN APPLICATION MANUAL - Contentstack

Mitsubishi Tension Controller LE-30CTA is a feedback-type automatic tension controller designed to maintain constant material tension in roll-to-roll applications like printing, slitting, and coating. It is often grouped technically with the

model, and their manuals share many operational similarities. Manual & Documentation Resources

Since the LE-30CTA is a legacy model, it has been largely superseded by newer series like the LE7-40GU-L

. You can find the necessary documentation through the following sources: 三菱電機 オフィシャルサイト Official Manual (LE-30CTN/CTA Reference): LE-30CTN Application Manual

provided by Mitsubishi Electric Europe covers safety, wiring, and core parameter settings for this generation of controllers. Instruction Guides:

For a detailed breakdown of 64 pages including wiring diagrams and troubleshooting, the LE-30CTN Instruction Manual on Scribd is a widely used technical reference. Transition Documentation: If you are upgrading or replacing a unit, the Production Discontinuation Technical News

explains how the LE-30CTN(A) compares to modern replacements. Key Specifications & Features Control Mechanism: Receives signals from tension detectors (like the

series) and outputs 0–24V DC to control powder clutches/brakes or 0–5V for servo amplifiers.

Features a dot-matrix LCD capable of displaying various characters and multi-language support (including Chinese). Includes a menu function that can store up to of operation data. Advanced Logic:

Includes a "weak excitation" function to improve torque response during low-speed starts. NanaSupplier.com Essential Safety Cautions Grounding: Class D grounding

(100Ω or less) using at least 2mm² wire. Never share grounding with strong electric systems to avoid noise interference. Wiring Separation: Keep control lines at least 100mm (3.94")

Chapter 3: Installation and Wiring

The manual stresses separation of power and signal lines. You must route the sensor cables (shielded twisted pair) away from motor leads. A common mistake documented in the manual’s troubleshooting guide is ground loops—it insists on a single-point ground for the controller.

Critical Wiring Table (from manual): | Terminal | Signal | Notes | | :--- | :--- | :--- | | 1, 2 | AC Power | Fuse protection required | | 5, 6, 7 | Tension Sensor (A, B, +EXC) | 5V excitation | | 10, 11 | Analog Output | To brake/clutch | | 14, 15 | External Setpoint | 0-10VDC input |

Step 1: Power On & Zero Calibration

  1. Apply power. The display will light up.
  2. Ensure the web (material) is not running and there is no load on the tension rollers.
  3. The PV display should read "0". If it shows a drift:
    • Locate the Zero Adjust potentiometer (often on the front panel or inside the door) or hold the "Zero" button until the display reads 0.

2.1 Front Panel Interface

  • Meter (Analog Display): Shows actual tension (left) and set tension (right) or output percentage.
  • Operation Mode Keys: RUN (Auto), STOP, JOG, and SET.
  • Parameter Dials: Two large potentiometers for ZERO and SPAN calibration.
  • LED Indicators: Power, Run, Error, and Output Limit.

When to consult the full manual or Mitsubishi support

  • For exact wiring diagrams, terminal assignments, and electrical ratings.
  • For detailed parameter lists and default values.
  • For firmware update procedures, advanced communication setup, or error-code tables.
  • For replacement parts and authorized service recommendations.

Finding the Manual

  1. Mitsubishi Electric Website: The first place to look is the official Mitsubishi Electric website. They usually have a support or downloads section where you can search for technical documentation, including manuals. You might need to select your product category, enter the model number (LE-30 CTA), and then download the manual.

  2. Mitsubishi Electric Support: If you can't find the manual online, consider contacting Mitsubishi Electric's customer support directly. They can provide you with the manual or guide you on where to find it.

  3. Industrial Automation Forums and Communities: Sometimes, online forums or communities focused on industrial automation and control systems can be very helpful. Members might have access to or share documentation, including manuals.

  4. Manual Libraries and Archives: There are websites dedicated to hosting and sharing technical manuals. You might find the manual you're looking for on one of these sites, but ensure it's a reputable source.

Part 5: Where to Find the Official Mitsubishi LE-30CTA Manual PDF

Given that this is a discontinued product, here are the legitimate sources (as of 2025):

  1. Mitsubishi Electric FA Global Support: Navigate to us.mitsubishielectric.com/fa/support. Search for "LE-30CTA." You may find it under "Archived Documents." Registration is free.
  2. Manual Library Websites: Sites like manualslib.com, industrialmanuals.com, or elektrotanya.com often host scanned copies. Always scan downloads for security.
  3. Used Machinery Dealers: If you bought a used slitter/rewinder, ask the dealer. Many have binders of original documentation.
  4. Contact Mitsubishi Directly: Email your local Mitsubishi Electric automation office. Provide the full model (e.g., LE-30CTA-U5). They can often email a legacy PDF.

Caution: Avoid fake "pay-per-download" sites that charge $50 for public-domain manuals. The LE-30CTA manual is copyrighted but freely distributed by Mitsubishi for existing users.