Key Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | ESMD113L4TXH509 |
| Series | Lenze SMD Series AC Drive |
| Rated Power | 11 kW (approx. 15 HP) |
| Input Voltage | 3/PE AC 400/480 V, 50-60 Hz |
| Output Voltage | 3/PE AC 0-400/460 V |
| Output Frequency | 0-240 Hz |
| Control Method | V/f control, Vector control |
| Overload Capacity | 150% rated current for 60 seconds |
| Switching Frequency | 4 / 6 / 8 / 10 kHz (selectable) |
| Digital Inputs | 3 programmable + 1 start/stop |
| Analog Inputs | 1 programmable (0-10V / 4-20mA) |
| Communication | RS485, Modbus (via optional module) |
| Protection Class | IP20 |
| Operating Temperature | 0°C to 55°C (derating above 40°C) |
| Mounting | DIN-rail or panel mount |
| Parameter Memory | EPM (Electronic Programming Module) chip |
Product Introduction
I’ve pulled enough burnt-out drives out of control cabinets to know that the Lenze SMD series is one of the few drives that actually survives a real factory floor. The ESMD113L4TXH509 is the 11 kW variant of Lenze’s SMD drive family — a workhorse inverter built for 3-phase 400/480 VAC systems. It’s not trying to be a servo drive or a motion controller. It’s doing one job: taking grid power and turning it into clean, controlled variable-frequency output for motors up to 11 kW.What makes the SMD series stick around in so many plants is the EPM chip. You can pull the parameter set from a running drive and plug it into a replacement in under 2 minutes. No laptop, no software, no guessing. I’ve used that trick to cut downtime from hours to minutes on a packaging line that couldn’t afford a PLC re-download. The “L” in the model code means it’s the Full I/O version with remote panel capability, and the “H509” suffix is a specific configuration code — verify the exact firmware version against your existing unit before swapping, because Lenze did push firmware updates across SMD production runs that changed how certain fault codes are logged.
Quality SOP & Tech Pitfalls
The Lab Report (SOP):Every unit goes through a five-step verification before it leaves our bench:
- Visual and Counterfeit Inspection — We check the nameplate for correct part number (ESMD113L4TXH509), verify the Lenze branding and serial number stamping, and inspect the heatsink fins for physical damage. We also check the EPM chip slot for corrosion or bent pins.
- Live Test on Motor Test Bench — We power the drive at 400 VAC 3-phase, run a no-load motor test, and verify the output voltage and frequency track correctly across the 0-240 Hz range. We check for abnormal noise from the IGBT switching stage.
- I/O Terminal Verification — We test each digital input, analog input (0-10V and 4-20mA), and relay output to confirm they respond correctly to simulated signals. We use a Fluke 115 for voltage checks and a loop calibrator for the 4-20mA input.
- EPM Chip Read/Write Test — We verify the installed EPM chip can be read and that parameters can be written to a blank chip. This is the single most useful feature on this drive, and a corrupted EPM slot is a common failure point on used units.
- Anti-Static Sealing — Unit is bagged in ESD-safe packaging with desiccant and a test report.
The Engineer’s Warning (Pitfalls):Two things will bite you with this drive:
- Not copying the EPM chip before pulling the old drive. I’ve seen technicians rip out a failed SMD drive, install a new one, and then spend four hours reprogramming parameters from a faded photocopy of the original settings. The EPM chip holds everything — motor data, acceleration ramps, I/O assignments, fault thresholds. Pull the chip from the old drive first. If the old drive is completely dead and the EPM won’t read, you’re in for a long night.
- Ignoring the derating rules above 40°C and 1000m altitude. The SMD series derates at 2.5% per °C above 40°C and 5% per 1000m above sea level. I once saw a drive at a high-altitude mine in Chile trip on overcurrent every time the ambient hit 45°C. The nameplate said 11 kW, but at that altitude and temperature, it was really an 8 kW drive. Check your environment before you blame the hardware.
Installation & Configuration Guide
Estimated swap time: 30 minutes (if EPM chip is transferred).
- Pre-Installation (⚠️ Safety First)
- Lock out/tag out the 400/480 VAC input power and the motor output leads.
- Wait at least 5 minutes for the DC bus capacitors to discharge. Verify with a multimeter — the DC bus terminals should read below 50 VDC before you touch anything.
- Remove and save the EPM chip from the old drive. This is the single most important step.
- Take a photo of all terminal wiring — power input (L1/L2/L3), motor output (U/V/W), brake resistor terminals, and all control wiring.
- Removal
- Label every wire at the terminal block. Don’t trust wire colors.
- Release the DIN-rail clip or remove the mounting screws.
- Pull the drive straight out. Don’t yank — the terminal blocks can crack.
- Installation
- Install the EPM chip from the old drive into the new ESMD113L4TXH509 before applying power. This copies all parameters instantly.
- Mount the new drive on the DIN rail or panel. Ensure at least 100mm clearance above and below for airflow.
- Reconnect all labeled wires to the matching terminals. Torque power terminals to spec (typically 2.5-3.0 N·m for the 11 kW frame size — verify with the nameplate or manual).
- If using a brake resistor, verify the wiring between the DC+ and brake terminals is correct. A reversed brake resistor connection will destroy the drive on first start.
- Power-On & Testing
- Restore input power. The drive should boot within 3-5 seconds. Check the display for any fault codes.
- Verify the motor data parameters match your motor nameplate (voltage, current, frequency, RPM).
- Run a no-load jog test in both directions. Listen for unusual noise or vibration.
- Gradually ramp up to full speed while monitoring output current. If the current is significantly higher than expected, check for motor winding issues or mechanical binding.
- If the EPM chip didn’t transfer parameters correctly, you’ll need to reprogram manually using the keypad or Lenze Engineer software via RS485.
Compatible Replacement Models
- ✅ Drop-in Replacement: Lenze ESMD113L4TXA — Same 11 kW, 400/480 VAC SMD drive. The “TXA” is the base Full I/O model; the “TXH509” is a specific configuration variant. Parameters should transfer via EPM chip. Verify firmware compatibility if the TXA is a significantly newer or older production date.
- ⚠️ Software Compatible: Lenze ESMD153L4TXA (15 kW) — One frame size up. Physically larger, but can be used as an upgrade if your application requires more headroom. Requires rewiring for the larger terminal block and reprogramming motor data. Budget 1-2 hours for commissioning.
- ❌ Hardware Mod Required: Lenze 8400 series or 9300 Vector drives — These are different product families with different mounting dimensions, terminal layouts, and parameter structures. Only consider these for a full system retrofit, not as an emergency swap.
Frequently Asked Questions (FAQ)
Can I hot-swap this drive while the motor is running?
No. The ESMD113L4TXH509 is not designed for hot-swap. You must de-energize the input power and wait for the DC bus to discharge before removing or installing the drive. Hot-swapping will damage the IGBTs and void any warranty.What does the “H509” suffix mean?
The “H509” is a configuration or firmware variant code specific to certain production batches or customer-specific configurations. The core hardware is the same as the ESMD113L4TXA. Verify the firmware version on your existing unit and match it on the replacement if possible. Lenze’s support team can confirm exact compatibility using the full part number.Will the EPM chip from my old ESMD113L4TXA work in the TXH509?
In most cases, yes. The EPM chip holds all drive parameters and is interchangeable within the SMD series. However, if the firmware versions are significantly different, you may get a parameter mismatch warning on boot. If that happens, you’ll need to clear the EPM and reprogram manually, or update the firmware to match.What’s the most common failure mode on these?
DC bus capacitor aging and IGBT failure from voltage spikes. After 10-15 years, the electrolytic capacitors dry out and the drive starts tripping on overvoltage or undervoltage faults. If your drive is tripping randomly on voltage faults with no apparent cause, the capacitors are the likely culprit. The IGBTs can fail from regenerative overvoltage if the brake resistor is undersized or disconnected.Does this drive support Modbus or CANopen?
The base ESMD113L4TXH509 supports RS485 with Modbus RTU protocol natively. CANopen requires an optional communication module. Verify which communication option is installed on your existing unit before ordering a replacement.Is this drive still manufactured by Lenze?
The SMD series is a mature product line. Lenze has shifted focus to the i500 and i700 series for new installations. The ESMD113L4TXH509 is still supported for spare parts, but long-term availability may be limited. If you’re maintaining an existing system, stocking a spare is a smart move. For new projects, consider evaluating the i500 series as a migration path.
