Lenze 8102_E.5B.21 8100 Series Frequency Inverter
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Product Information
The Lenze 8102_E.5B.21 is a compact 0.75 kW single-phase frequency inverter from the Lenze 8100 series, engineered for precise speed regulation of standard AC induction motors. Operating on a 230 V AC single-phase supply with an input range from 190 V AC to 260 V AC, the drive delivers up to 4 A rated output current over an output frequency spectrum from 0 to 480 Hz. The drive utilizes V/f characteristic control with configurable slip compensation to maintain consistent motor speed and torque under changing mechanical loads. Housed in an IP20 rated enclosure for control cabinet mounting, this variable frequency drive is widely deployed in material handling, packaging lines, HVAC systems, and general industrial manufacturing.
Integration and wiring are accomplished via built-in screw terminal strips for control I/O, along with a dedicated port for plug-in operating interfaces. Serial communication is supported using optional LECOM-A or LECOM-B modules for RS-232 or RS-485 networks. Replacing a failed drive requires transferring the operational configuration, as replacement units do not operate automatically on factory defaults. Parameter settings are preserved in integrated non-volatile EEPROM memory, preventing parameter loss during power outages. Settings can be transferred using the plug-in 8100 Operating Keypad or Lenze Global Drive Control software. ABC Industrial Parts can assist maintenance teams with parameter recovery, configuration transfer, and donor unit alignment to ensure rapid operational recovery.
Drive state monitoring is provided by status LEDs, including a Ready/Power indicator and a Fault/Trip indicator. Detailed fault diagnosis is accessible through parameter register C00x or via keypad and software readouts. Common trip events include overcurrent during acceleration, deceleration, or steady operation, DC bus overvoltage or undervoltage, heat sink overtemperature, and motor thermal overload. Initial checks should verify line voltage stability, motor cable insulation, mechanical load conditions, and enclosure ventilation. Persistent internal errors, such as EEPROM corruption, indicate hardware failure that cannot be serviced on site, making board repair or a tested replacement module from ABC Industrial Parts the fastest solution to minimize downtime.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 8102_E.5B.21 |
| Model / Series | 8100 Series |
| Component Type | Frequency Inverter |
| Rated Power | 0.75 kW |
| Supply Voltage | 230 V AC |
| Supply Voltage Range | 190 - 260 V AC |
| Rated Output Current | 4 A |
| Output Frequency Range | 0 - 480 Hz |
| Control Method | V/f characteristic control with configurable slip compensation |
| Protection Rating | IP20 |
| Optional Fieldbus Interface | LECOM-A / LECOM-B (RS-232 / RS-485) |
Programming and Configuration
System setup and parameter adjustment for the Lenze 8102_E.5B.21 inverter can be executed using the optional plug-in 8100 Operating Keypad or Lenze Global Drive Control (GDC) software. Through these tools, engineers can adjust acceleration and deceleration ramps, configure V/f characteristic curves, and enable slip compensation to optimize motor response under varying load conditions.
All configured parameter profiles are stored directly in internal non-volatile EEPROM memory, securing operational settings against power interruptions without requiring battery backup. Parameter register C00x stores fault history and runtime diagnostics, allowing technicians to upload, back up, or restore complete parameter sets during routine maintenance or drive replacement.
Communication and System Integration
The Lenze 8102_E.5B.21 frequency inverter interfaces with supervisory control systems through modular communication options. The drive incorporates standard screw terminal strips for hardwired digital and analog I/O signals, supplemented by an expansion interface for fieldbus modules.
Network connectivity is achieved using plug-in LECOM-A or LECOM-B serial communication modules, which support RS-232 and RS-485 physical links. These interfaces enable remote parameterization, continuous operational monitoring, and fieldbus control from centralized controllers or automated control networks.
Diagnostics and Status Indication
Visual status evaluation is provided directly on the drive unit by status indicators. A Ready / Power LED confirms that input supply voltage is connected and the inverter is prepared for operation, while a Fault / Trip LED illuminates when a trip condition deactivates output power.
For targeted fault analysis, the drive provides fault memory access via parameter register C00x. Technicians can read current trip codes and historical fault logs using the plug-in 8100 Operating Keypad module or Global Drive Control diagnostic software.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Ready / Power LED | Supply voltage connected; drive ready for operation | |
| Fault / Trip LED | Drive trip active; check fault code on keypad or diagnostic software |
Replacement and Spare Part Considerations
The Lenze 8100 series is an established legacy product line. The 8102_E.5B.21 drive provides direct physical and electrical compatibility for existing machine installations, permitting fast swapping of damaged units without modifying enclosure layouts or control wiring.
When installing a spare drive, parameter settings must be copied from the original unit or uploaded from software backups, as replacement units carry default settings. Key parameters such as current limits, ramp times, and motor control modes must match machine requirements precisely.
While Lenze recommends the i510 cabinet series for complete system modernizations, replacing an aging unit with an identical 8102_E.5B.21 drive avoids the need for panel re-engineering, PLC program modifications, or physical re-wiring.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OC1 | Overcurrent during acceleration | Output current exceeded overcurrent threshold during motor acceleration phase. | Acceleration ramp time too short; motor cable short circuit; motor blocked. | Increase acceleration time; check motor wiring, insulation, and motor load. |
| OC2 | Overcurrent during deceleration | Output current exceeded overcurrent threshold during deceleration phase. | Deceleration ramp time too short; excessive regenerative energy. | Increase deceleration time or install braking module/resistor. |
| OC3 | Overcurrent at constant speed | Output current exceeded threshold during steady-state operation. | Sudden load surge; motor overload; short circuit. | Check mechanical load; check motor cables for short circuit. |
| OU | Overvoltage in DC bus | DC bus voltage exceeded maximum allowable threshold. | Mains supply overvoltage; deceleration time too short. | Check mains voltage; extend deceleration time or add brake resistor. |
| LU | Undervoltage in DC bus | DC bus voltage dropped below minimum threshold. | Mains power interruption; voltage sag under load; blown input fuse. | Check input power supply line voltage and incoming fuses. |
| OH | Overtemperature heat sink | Heat sink temperature exceeded maximum safe operating temperature. | Insufficient cabinet ventilation; cooling fan fault; clogged heat sink fins; high ambient temperature. | Clean heat sink fins; ensure correct enclosure cooling; check fan operation. |
| OL | Motor thermal overload (I2t) | Thermal motor protection triggered due to sustained overload condition. | Continuous motor overload; improper motor parameter configuration. | Reduce load on motor; check motor rating and parameter setup. |
| EE | EEPROM fault | Parameter data loss or corruption in internal memory. | Interrupted parameter write cycle; internal hardware fault. | Reset parameters to factory default. Internal board failure — return unit for repair if error persists. |
Frequently Asked Questions
How are parameters transferred to a replacement Lenze 8102_E.5B.21 inverter?
Parameter settings stored in the internal EEPROM can be backed up and restored using the plug-in 8100 Operating Keypad or Lenze Global Drive Control (GDC) software connected via a LECOM serial module.
What power and input supply specifications does the 8102_E.5B.21 require?
The drive requires a single-phase 230 V AC supply (190 to 260 V AC operating range) and provides a rated output current of 4 A for motors rated up to 0.75 kW.
What serial communication options are supported on this drive?
The 8102_E.5B.21 supports plug-in LECOM-A and LECOM-B communication modules, offering RS-232 or RS-485 interfaces for remote monitoring and network control.
What does fault code EE indicate on the 8102_E.5B.21 drive?
Fault code EE indicates parameter corruption or memory loss in the internal EEPROM. Resetting parameters to factory defaults may clear the fault, but persistent EE errors indicate an internal hardware fault requiring repair.
Is the Lenze 8102_E.5B.21 a direct replacement for existing 8100 series drives?
Yes, it provides direct mechanical and electrical compatibility for existing 8100 series panel installations, provided the parameter profile from the replaced unit is copied over.
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