Lenze 341353 8104_S.4A.12 Frequency Inverter
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Product Information
The Lenze 341353, model designation 8104_S.4A.12 (also designated as EVF8104-S), is a 0.75 kW AC frequency inverter from the Lenze 8100 series engineered for precise motor speed regulation in industrial automation environments. Designed with an IP20-rated enclosure for space-saving cabinet mounting, this compact drive operates across a 3-phase mains input range of 320 V to 528 V AC (400 V / 480 V nominal). It supplies a continuous output current of 2.5 A with an adjustable output frequency from 0 to 480 Hz and output voltage from 0 to 480 V AC. Featuring adjustable switching frequencies up to 16 kHz and selectable linear or quadratic V/f characteristic control, it delivers low-noise motor operation and reliable dynamic performance across material handling conveyors, industrial pumps, ventilation fans, and packaging machinery.
Connecting the inverter into an automated control system is handled through 4 programmable digital inputs, 1 digital status relay output, and 1 analog setpoint input supporting 0–10 V or 0/4–20 mA signals. For fieldbus integration, the unit features a front interface slot that accepts plug-in communication modules, including LECOM-A (RS232), LECOM-B (RS485), 2102IB LECOM, 2131IB PROFIBUS-DP, and 2171IB or 2172IB CANopen modules. Commissioning a spare unit requires parameter alignment, which is accomplished using the optional 8201BB operating keypad module or Lenze Global Drive Control (GDC) PC software. Integrated non-volatile EEPROM memory enables rapid parameter cloning to duplicate operational settings onto replacement drives, and ABC Industrial Parts can assist technical teams with sourcing compatible spare units or parameter extraction routines during replacement.
Diagnostic monitoring is indicated locally via front-panel status LEDs and terminal relay output states. A continuous green LED signals normal motor operation, whereas a flashing green light indicates standby readiness. Active trip faults or overload conditions activate the red LED, with explicit fault codes such as OC1, OC2, OU, LU, or CE0 accessible through the 8201BB keypad diagnostic menu or the GDC software diagnostic buffer. Initial maintenance checks should verify input supply voltage, fuse integrity, motor connection wiring, and ambient thermal conditions. If memory checksum faults like EEr persist due to internal EEPROM hardware corruption, internal component repair or a tested exchange unit from ABC Industrial Parts offers a quick route back to active production.
Technical Specifications
| Rated Power Output | 0.75 kW |
| Supply Voltage Range | 320 - 528 V AC |
| Mains Input Voltage Class | 3x 400 / 480 V AC |
| Rated Input Current | 3.2 A |
| Continuous Output Current | 2.5 A |
| Output Voltage Range | 0 - 480 V AC |
| Output Frequency Range | 0 - 480 Hz |
| Switching Frequency | 16 kHz |
| Control Method | V/f Characteristic Control |
| Digital Inputs | 4 |
| Digital Outputs | 1 |
| Analog Inputs | 1 |
| Enclosure Rating | IP20 |
| Mounting Type | Cabinet Mounting (Schrankaufbau) |
Programming and Configuration
Programming and parameter adjustments on the Lenze 341353 8104_S.4A.12 frequency inverter are performed using either the plug-in 8201BB operating keypad module or Lenze Global Drive Control (GDC) PC software. Connecting via GDC software allows commissioning engineers to configure motor nameplate data, set acceleration and deceleration ramps, select linear or quadratic V/f characteristics, and assign digital and analog terminal functions.
The inverter utilizes internal non-volatile EEPROM storage to preserve parameter settings without external battery backup. During replacement procedures, stored parameter sets can be cloned directly to a replacement unit using saved GDC project files or by uploading parameter profiles through the 8201BB operating keypad, ensuring seamless continuity in machine behavior.
Communication and System Integration
System integration for the Lenze 341353 8104_S.4A.12 drive is facilitated by an integrated option card slot. Direct point-to-point and multi-drop serial communication is supported through attachable LECOM-A (RS232) and LECOM-B (RS485) modules, enabling PC software connection and PLC status polling.
For integration into standardized industrial fieldbus networks, the drive accepts option modules such as the 2131IB PROFIBUS-DP module and 2171IB or 2172IB CANopen modules. These modules plug into the front interface slot to allow real-time control word distribution, setpoint transmission, and diagnostic data access over fieldbus networks.
Diagnostics and Status Indication
Visual status monitoring on the Lenze 341353 8104_S.4A.12 front panel relies on dual green and red status LEDs combined with a programmable relay contact output. The green LED signals power and operation modes, while the red LED alerts operators to overloads or active fault trips.
Comprehensive diagnostic routines can be accessed via the diagnostic menu on the 8201BB operating keypad or by viewing the online diagnostic buffer in Lenze Global Drive Control (GDC) software. These interfaces report real-time drive operational variables, current trip logs, and clear fault designations.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Green LED | Green - Solid or Flashing | Continuous ON indicates normal drive operation; flashing indicates drive ready / standby mode. |
| Red LED | Red - Solid or Flashing | Continuous ON or flashing pattern indicates active trip fault or overload warning. |
Replacement and Spare Part Considerations
When installing a replacement Lenze 341353 (8104_S.4A.12) inverter, ensure that the power rating (0.75 kW) and mains input voltage range (3x 400V/480V AC) match the existing drive specification. Before placing the spare unit into production, parameter sets must be transferred to ensure correct motor protection limits, ramp times, and I/O terminal assignments.
Existing fieldbus modules—such as LECOM, PROFIBUS-DP, or CANopen cards—must be transferred from the original unit to the option slot of the spare drive. For facilities planning complete system modernizations, Lenze i510 or i550 cabinet frequency inverters serve as modern replacements, requiring minimal control panel wiring updates.
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 safety threshold during acceleration ramp. | Acceleration time too short, motor cable short circuit, motor ground fault, or undersized drive. | Increase acceleration time, inspect motor wiring and insulation, verify motor load and drive power matching. |
| OC2 | Overcurrent during deceleration | Output current exceeded safety threshold during deceleration ramp. | Deceleration time too short, regenerative energy overload, or short circuit in motor output. | Increase deceleration time, install braking resistor if equipped, inspect motor wiring. |
| OC5 | Overcurrent at constant speed | Drive output current exceeded safety threshold during steady-state operation. | Sudden load impulse, mechanical jamming, or motor winding fault. | Check mechanical drive system for jam or blockage; inspect motor and load current. |
| OU | DC bus overvoltage | DC bus voltage exceeded upper voltage threshold. | Mains supply voltage too high or generatoric feedback from motor during deceleration without brake chopper. | Extend deceleration time, check brake chopper/resistor function, and verify input supply voltage. |
| LU | DC bus undervoltage | DC link voltage dropped below minimum operating limit. | Mains supply failure, supply phase loss, or input voltage too low. | Check AC supply line voltage, input fuses, and wire connection integrity. |
| OH | Heatsink overtemperature | Heatsink temperature exceeded internal thermal trip limit. | Insufficient ventilation, ambient temperature too high, dirty heatsink fins, or cooling fan failure. | Improve enclosure ventilation, clean heatsink cooling fins, and verify internal cooling fan operation. |
| OH4 | Motor overtemperature | Motor temperature sensor input (PTC / thermal contact) triggered. | Motor thermal overload, cooling fan failure on motor, or open circuit on PTC input terminal. | Allow motor to cool down, inspect motor load condition, and check PTC wiring on control terminals. |
| LP | Mains phase failure | One phase of the 3-phase AC input supply line is missing or severely unbalanced. | Blown input fuse or loose terminal connection on L1, L2, or L3. | Check all three mains supply voltage lines under load condition. |
| EEr | EEPROM memory fault | Internal EEPROM data corruption or memory checksum error. | Internal memory corruption due to EMC disturbance or power loss during write cycle; internal hardware fault. | Attempt factory default parameter restore. If fault persists, replace the unit or contact service. |
| CE0 | Communication error | Communication interruption between inverter and fieldbus or LECOM module. | Loose connector, cable break, baud rate mismatch, or timeout setting exceeded. | Check communication cable, shield termination, module seating, and master controller polling. |
Frequently Asked Questions
What are the primary power output and voltage specifications for Lenze 341353?
The Lenze 341353 (model 8104_S.4A.12) features a 0.75 kW power rating, operates on a 3-phase AC input of 320 V to 528 V AC (400 V / 480 V nominal), and delivers up to 2.5 A continuous output current.
How do I transfer parameters to a replacement Lenze 341353 drive?
Drive parameters stored in non-volatile EEPROM memory can be uploaded and downloaded using Lenze Global Drive Control (GDC) PC software or transferred using an attachable 8201BB operating keypad module.
Which communication fieldbus modules are supported by model 8104_S.4A.12?
The inverter accepts plug-in modules via its front option slot, including LECOM-A (RS232), LECOM-B (RS485), 2102IB LECOM, 2131IB PROFIBUS-DP, and 2171IB or 2172IB CANopen modules.
What do the front-panel status LEDs indicate on the drive?
A solid green LED indicates normal operation, while a flashing green LED indicates standby mode. A solid or flashing red LED indicates an active fault trip or thermal overload condition.
How should an EEr fault code be addressed?
An EEr fault signals an internal EEPROM checksum error. Attempt a factory reset and parameter reload. If the error persists, an internal memory or hardware failure is present and the drive requires repair or replacement.
What is the recommended modern replacement drive for Lenze 341353?
The modern direct successor drives for the legacy Lenze 8100 series are the Lenze i510 or i550 cabinet frequency inverters.
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