Lenze I55AE137B10010000S i550 Cabinet Inverter 0.37kW
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Product Information
The Lenze I55AE137B10010000S is a compact 0.37 kW (0.5 HP) frequency inverter from the i550 Cabinet Inverter series within the Lenze i500 product family. Designed for space-saving control cabinet mounting with an IP20 enclosure rating, this variable frequency drive operates on a single-phase 230 V AC supply across an operational range of 180 to 264 V AC, producing a 3-phase output with a continuous current rating of 2.4 A. The unit supports versatile motor control methods, including V/f linear, V/f quadratic, energy-efficient V/f Eco, Sensorless Vector Control (SLVC), and Sensorless Synchronous Motor control (SL-PSM) for asynchronous and synchronous machines. Integrated functional safety is provided via dedicated Safe Torque Off (STO) hardware certified to EN ISO 13849-1 PL e and SIL 3 standards.
Field connection and commissioning are engineered for fast installation using plugable spring-cage terminals, accommodating 5 configurable digital inputs, 1 digital output, 2 multi-function analog inputs, and 1 analog output. Deploying a replacement drive requires minimal downtime thanks to the plug-in Lenze EASY Memory module (i5MADEE0000S), which allows full parameter sets to be transferred between units without software or special tools. System configuration and diagnostics can also be performed via Lenze EASY Starter software, the USB Diagnostic Adapter (i5MADU0000S), or optional communication modules such as the PROFINET module (i5CA51000S). Maintenance personnel looking to source tested replacement units or verify parameter backups can rely on expert support from ABC Industrial Parts.
System status monitoring and diagnostics are provided via front-panel RDY and ERR LEDs, which indicate operating readiness and active faults through distinct lighting patterns. The drive actively tracks operational parameters such as DC bus voltage, output frequency, and heatsink temperature while logging diagnostic faults with timestamps in an internal memory buffer. Standard fault codes include 0x0011 (Earth fault), 0x0012 (Short circuit), 0x0031 (DC-bus overvoltage), and 0x0061 (STO error). While issues related to input power, control wiring, or parameters can be resolved in the field, internal power section failures or persistent short-circuit trips indicate hardware damage. ABC Industrial Parts supplies tested replacement units to help restore machine production quickly when hardware failure occurs.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | I55AE137B10010000S |
| Model / Type | i550 Cabinet Inverter |
| Product Family | i500 Series |
| Component Type | Frequency Inverter |
| Rated Power | 0.37 kW |
| Supply Voltage | 230 V AC (1-phase, 180-264 V AC) |
| Mains Input Current | 4.8 A |
| Output Voltage | 230 V AC (3-phase) |
| Continuous Output Current | 2.4 A |
| Output Frequency Range | 0 - 599 Hz |
| Switching Frequency | 8 kHz |
| Digital Inputs | 5 |
| Digital Outputs | 1 |
| Analog Inputs | 2 |
| Analog Outputs | 1 |
| Protection Rating | IP20 |
| Safety Function | Safe Torque Off (STO) PL e / SIL 3 |
Programming and Configuration
The Lenze i550 inverter architecture supports flexible configuration workflows tailored for both automated machine building and rapid field replacement. Drive parameters can be configured using Lenze EASY Starter commissioning software when connected to a PC via the optional Lenze USB Diagnostic Adapter (i5MADU0000S) or through a connected fieldbus network. The software platform provides complete parameter access, custom I/O mapping, motor auto-tuning routines, and real-time monitoring.
For routine maintenance and unit swaps, the inverter uses a plug-in Lenze EASY Memory module (part number i5MADEE0000S). This EEPROM module stores all operational parameters, motor characterization data, and safety configurations. When replacing a failed drive, technicians can transfer the existing memory card directly into the spare unit, instantly copying the complete configuration without requiring a PC or software tools.
Communication and System Integration
Network connectivity for the I55AE137B10010000S inverter is managed through an optional extension slot that supports several industrial fieldbus systems. Modules such as the Lenze i5CA51000S PROFINET card allow direct integration into high-speed automation networks, while additional options support EtherCAT, EtherNet/IP, CANopen, and Modbus RTU protocols.
Hardwired control signals connect directly to plugable spring-cage terminals on the front panel, providing access to 5 digital inputs, 1 digital output, 2 analog inputs, and 1 analog output. Wireless parameter access and diagnostic inspection can also be performed on the plant floor using the EASY UI Mobile application paired with an optional WLAN diagnostic adapter.
Diagnostics and Status Indication
The inverter provides immediate visual status through two LED indicators located on the front panel. The green RDY LED indicates operational readiness and drive execution states, while the red ERR LED highlights fault conditions or active errors. The drive monitors live operational values including DC bus voltage, output frequency, heatsink temperature, and motor load in real time.
An internal fault buffer logs historic error events along with operating hour timestamps to streamline troubleshooting. Maintenance personnel can inspect these fault records directly via Lenze EASY Starter software, an optional WLAN adapter paired with the EASY UI Mobile app, or network control words over fieldbus interfaces.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| RDY | Green - Solid / Flashing | Inverter operational readiness or operating state |
| ERR | Red - Solid / Flashing | Fault condition or system error detected |
Replacement and Spare Part Considerations
When installing a replacement Lenze I55AE137B10010000S unit, confirm that the spare matches the 0.37 kW power rating, 1-phase 230 V AC input supply specification, and 2.4 A output current capability. Because this model includes integrated Safe Torque Off (STO) functional safety, verify that the 24 V DC safety circuit signals are correctly wired to the safety terminals to enable inverter operation.
To complete a physical replacement, disconnect power, detach the plugable spring-cage terminal strips, and swap any installed extension cards such as the PROFINET communication module (i5CA51000S). Transfer the original EASY Memory card (i5MADEE0000S) to the replacement drive to clone all parameter profiles. If fault codes such as 0x0011 or 0x0012 persist after motor insulation checks, the power module has suffered permanent internal failure and the drive unit must be replaced.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| 0x0011 | Earth fault | Ground fault detected on motor phase leads or motor winding | Short circuit to earth in motor cable or motor windings | Check motor cable and motor insulation resistance. If insulation is fine and fault persists immediately upon power-up, internal power section failure - contact service or replace unit. |
| 0x0012 | Short circuit | Overcurrent / short circuit detected between output phases | Phase-to-phase short circuit in motor or wiring; acceleration ramp too steep | Check motor wiring and motor impedance. Check parameter settings. If error occurs without motor connected, internal hardware fault - replace unit. |
| 0x0021 | Motor overload (I2t) | Thermal motor protection triggered due to continuous high current | Motor mechanically overloaded or rated current set incorrectly | Check motor load and motor nameplate parameters in inverter setup |
| 0x0022 | Inverter overload (I2t) | Thermal overload of frequency inverter power module | Drive operated above continuous output rating for too long | Reduce mechanical load, check duty cycle, or select larger inverter rating |
| 0x0031 | DC-bus overvoltage | DC bus voltage exceeds maximum threshold limit | Regenerative energy during deceleration too high; deceleration time too short | Increase deceleration ramp time or connect brake resistor if supported |
| 0x0032 | DC-bus undervoltage | DC bus voltage dropped below lower operational limit | Mains supply failure, supply voltage drop, or blown input fuse | Check line supply voltage and input power connections |
| 0x0041 | Heatsink overtemperature | Power module heatsink temperature exceeds maximum safety limit | Inadequate ventilation, fan blocked/failed, high ambient temperature | Clean cooling fins, verify cabinet air flow and enclosure fan operation |
| 0x0042 | Motor overtemperature | Motor temperature sensor input tripped | Motor overheating or temperature sensor cable broken | Check motor cooling and temperature sensor connections (PTC/NTC/NC) |
| 0x0051 | Mains phase failure | Input line phase loss or severe voltage imbalance detected | Loose input phase wire, blown supply fuse, phase drop | Check AC mains supply terminals and input line fuses |
| 0x0052 | Motor phase failure | Disconnection or missing phase detected on inverter output to motor | Broken motor lead or loose output terminal connection | Check motor cabling and output terminal screw connections |
| 0x0061 | Safe Torque Off (STO) active / error | Safety function Safe Torque Off active or mismatch in safety channels | STO input open or wiring fault on safety terminals | Verify STO input signals (24 V DC present on safety terminals for normal run) |
| 0x0081 | Memory module error | EASY Memory module missing, corrupted, or invalid configuration | Memory card not properly inserted or damaged | Reseat memory card, format or restore parameter set. If unreadable, replace memory card. |
Frequently Asked Questions
How do I transfer parameters to a replacement Lenze I55AE137B10010000S drive?
Parameters can be transferred without software tools by swapping the plug-in Lenze EASY Memory module (i5MADEE0000S) from the old unit into the replacement inverter. Alternatively, parameter sets can be uploaded and restored using Lenze EASY Starter software via a USB Diagnostic Adapter (i5MADU0000S).
What power input does the I55AE137B10010000S inverter require?
This model operates on a single-phase 230 V AC supply with an operational voltage range of 180 to 264 V AC and a rated input current of 4.8 A.
What does fault code 0x0061 indicate on this drive?
Fault code 0x0061 indicates that the Safe Torque Off (STO) function is active or there is a channel signal mismatch on the safety terminals. Verify that 24 V DC is applied across the STO inputs for normal operation.
Which communication options are supported on the Lenze i550 inverter?
The drive supports plug-in communication modules for PROFINET (i5CA51000S), EtherCAT, EtherNet/IP, CANopen, and Modbus RTU.
What steps should be taken if fault 0x0011 or 0x0012 appears immediately upon power-up?
Check motor cabling and measure winding insulation resistance. If external wiring and motor insulation are normal but the earth fault (0x0011) or short circuit fault (0x0012) triggers immediately without a motor connected, the inverter power section has failed internally and requires unit replacement.
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Specific firmware and hardware versions
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