Lenze 8102_E.5C.21 8100 Series 0.75kW Frequency Inverter
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Product Information
The Lenze 8102_E.5C.21 is a compact single-phase frequency inverter from the Lenze 8100 series, engineered for variable motor speed control of three-phase AC asynchronous motors rated up to 0.75 kW (1 HP). Operating on a nominal 230 V AC mains supply with an input voltage range of 180 V to 264 V AC, this drive supplies a continuous output current of 4 A across an adjustable output frequency range of 0 to 480 Hz. Motor control is delivered using linear or quadratic V/f characteristic curves with integrated slip compensation logic to maintain consistent shaft speed during load variations. High-frequency switching up to 16 kHz reduces acoustic winding noise in motor applications, while parameter data is preserved securely in internal non-volatile EEPROM memory without requiring a battery backup.
Integrating a spare 8102_E.5C.21 inverter into a machine panel involves connecting built-in control terminals and configuring application settings. Terminal interfaces include four programmable digital inputs, one analog setpoint input supporting 0–10 V or 0/4–20 mA signals, and one relay output contact for status and fault signaling. The drive features an interface slot that accepts optional plug-in modules, such as LECOM RS232 (LECOM-A), RS485 (LECOM-B), optical fiber (LECOM-LI), or 2111 CANopen fieldbus adapters. Parameter transfer during commissioning can be completed by copying settings with an optional 2102IB keypad module or downloading configurations via Lenze Global Drive Control (GDC) software. Technical support from ABC Industrial Parts is available to help match interface modules and transfer parameters when commissioning replacement units.
System state monitoring and fault diagnostics on the Lenze 8102_E.5C.21 are conducted using visual LED indicators and diagnostic interface menus. Three front panel status LEDs indicate drive condition: a solid green RUN LED signals normal controller operation, a solid yellow IMP LED shows pulse inhibit standby, and a solid red TRIP LED alerts operators to an active trip fault. When troubleshooting external issues such as OC1 overcurrent, OU overvoltage, or LU undervoltage, initial maintenance checks should focus on motor winding insulation, supply line stability, and deceleration ramp timing. For unrecoverable hardware failures like EEw memory write errors, internal board repairs are required, and ABC Industrial Parts can assist in sourcing tested replacement drives to restore production rapidly.
Technical Specifications
| Manufacturer | Lenze |
| Part number | 8102_E.5C.21 |
| Model / Type | 8102 E.5C.21 |
| Product series | 8100 Series |
| Component type | Frequency Inverter |
| Rated power | 0.75 kW |
| Supply voltage range | 230 V AC (180 V to 264 V AC operational) |
| Continuous output current | 4 A |
| Output voltage | 230 V AC |
| Output frequency range | 0 Hz to 480 Hz |
| Switching frequency | Up to 16 kHz |
| Control method | Linear or Quadratic V/f Characteristic Control with Slip Compensation |
| Digital inputs | 4 programmable |
| Digital outputs | 1 relay contact output |
| Analog inputs | 1 (0-10 V or 0/4-20 mA) |
| Parameter memory | Internal non-volatile EEPROM |
Programming and Configuration
Parameter configuration for the Lenze 8102_E.5C.21 frequency inverter can be carried out using the plug-in 2102IB keypad operating module or through PC software tools. The 2102IB keypad connects directly to the front extension slot of the drive, granting access to parameter menus for setting acceleration and deceleration ramps, motor voltage curves, setpoint source choices, and terminal mapping. The keypad also supports direct parameter transfer between identical drives, enabling fast drive cloning during maintenance without entering parameter values manually.
For software-based commissioning and diagnostic monitoring, the drive connects to Lenze Global Drive Control (GDC) software via an optional LECOM interface module. Stored parameters are saved directly in non-volatile internal EEPROM memory, ensuring that drive configurations, setpoint limits, and adjusted V/f parameters are retained during complete power shut-downs without relying on battery backup.
Communication and System Integration
The modular interface design of the Lenze 8100 series permits integration of the 8102_E.5C.21 drive into centralized control architecture. The integrated front module slot allows technicians to attach serial or fieldbus communication adapters depending on plant network protocols. Supported communication adapters include LECOM RS232 (LECOM-A), RS485 (LECOM-B), and optical fiber (LECOM-LI) modules.
For direct fieldbus networking, the drive supports the 2111 CANopen fieldbus module. Installing a communication adapter enables external PLCs or supervisory computers to send speed setpoints, execute start/stop control words, and read real-time drive diagnostics over serial links. Proper network termination, correct baud rate configuration, and matching node addressing are necessary to ensure stable network performance and avoid serial communication timeouts.
Diagnostics and Status Indication
Operational status and trip diagnostics on the Lenze 8102_E.5C.21 inverter are monitored via onboard LED indicators, the 2102IB keypad module, or Global Drive Control (GDC) software. Three status LEDs mounted on the front face of the unit provide clear visual indications of operating states and fault triggers during routine maintenance inspections.
Detailed fault history registers are recorded internally and can be accessed using the 2102IB keypad display or through the GDC software diagnostic view over a LECOM connection. Reviewing historical error logs helps maintenance technicians trace intermittent issues related to line voltage fluctuations, motor overload conditions, or communication interrupts.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| TRIP | Red - Solid | Fault / Trip active |
| RUN | Green - Solid | Controller enabled / Normal operation |
| IMP | Yellow - Solid | Pulse inhibit / Standby |
Replacement and Spare Part Considerations
When selecting a replacement for a Lenze 8102_E.5C.21 drive, confirm that the input power rating matches your line supply (single-phase 230 V AC, 180–264 V AC operational) and that the continuous output rating of 4 A covers your 0.75 kW motor requirements. Ensuring part number consistency prevents mismatches in control wiring, terminal assignments, and interface module compatibility.
Before replacing a unit in production, parameters must be transferred from the original drive to the replacement spare. If the existing inverter powers up, settings can be saved using the 2102IB keypad module or downloaded via Global Drive Control (GDC) software and uploaded into the replacement unit. For complete facility upgrades or modernization projects, Lenze i510 and i550 series cabinet inverters are the recommended modern successor series.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OC1 | Short Circuit | Short circuit detected at motor output terminals | Short circuit in motor winding or cable; ground fault; acceleration time set too short | Check motor cable and winding insulation; increase acceleration ramp time. If fault persists when disconnected from motor, internal power stage failure requires unit repair or replacement. |
| OC2 | Earth Fault | Ground fault / earth short circuit detected on output side | Motor cable capacitance too high or insulation failure to earth | Check motor and wiring insulation resistance to earth. |
| OC5 | I2t Overload | Overload integration timer exceeded (150% overload limit exceeded) | Excessive mechanical load, motor size mismatch, persistent overcurrent condition | Reduce load on motor, check drive sizing against actual mechanical torque requirements. |
| OU | Overvoltage DC Bus | DC bus voltage exceeded upper limit threshold | Deceleration time too short, motor feeding regenerative energy back into drive | Increase deceleration ramp time or connect a braking resistor/chopper module if supported. |
| LU | Undervoltage DC Bus | DC bus voltage fell below lower threshold limit | Mains supply voltage drop, phase failure, mains supply voltage too low | Verify line input voltage and power supply connection stability. |
| OH | Heatsink Overtemperature | Heatsink temperature exceeded safety limit | Insufficient cooling airflow, dirty heatsink fins, excessive ambient temperature | Clean heatsink cooling fins; verify cabinet ventilation fan operation and clearances. |
| OH4 | Motor Overtemperature | Motor thermistor (PTC/TKO) circuit tripped | Motor thermal overload, external motor cooling fan failure | Allow motor to cool down, check motor load and inspect external cooling fan. |
| CE0 | LECOM Communication Fault | Serial communication link timeout | Interrupted serial interface cable, baud rate mismatch, missing watchdog trigger | Inspect LECOM communication cabling, check interface module seating, and verify master host protocol settings. |
| EEr | EEPROM Read Error | Internal non-volatile memory read fault during power-up or access | Corrupted EEPROM memory content or power interruption during write cycle | Reset parameters to factory defaults. If error persists, internal control board hardware failure requires unit replacement. |
| EEw | EEPROM Write Error | Internal EEPROM write operation failure | Hardware failure of internal EEPROM IC | Internal hardware fault; return unit for repair or replace inverter. |
Frequently Asked Questions
What is the primary power requirement for the Lenze 8102_E.5C.21 inverter?
The Lenze 8102_E.5C.21 operates on a single-phase 230 V AC supply with an operational input range between 180 V AC and 264 V AC, delivering up to 4 A continuous output current to 0.75 kW motors.
How are parameter settings backed up or copied to a replacement drive?
Parameters can be copied between drives using the optional 2102IB keypad module or saved to a PC using Lenze Global Drive Control (GDC) software over a LECOM communication module. Settings are saved in non-volatile internal EEPROM memory.
What do the RUN, IMP, and TRIP status LEDs indicate?
A solid green RUN LED indicates normal operation with the controller enabled. A solid yellow IMP LED signifies pulse inhibit or standby mode. A solid red TRIP LED indicates an active fault condition.
Which communication protocols are supported on this model?
The drive features an extension slot that supports LECOM RS232 (LECOM-A), RS485 (LECOM-B), optical fiber (LECOM-LI), or 2111 CANopen fieldbus modules.
What action should be taken if an EEw or EEr fault code appears?
An EEr (read error) can initially be handled by resetting parameters to factory defaults. If EEr persists, or if an EEw (write error) occurs, an internal EEPROM hardware failure is present, requiring repair or drive replacement.
What modern Lenze drive series is recommended when upgrading from the 8100 series?
The Lenze i510 and i550 series inverters serve as the recommended modern upgrade path for legacy 8100 series applications.
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