Lenze EMB9342-E Regenerative Supply and Feedback Module
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Product Information
The Lenze EMB9342-E is a 15 kW regenerative supply and feedback module designed for multi-axis drive architectures within the Lenze 9300 System. Functioning across a 3-phase AC input voltage range of 320 V to 528 V AC with a rated mains current of 27 A, this unit converts surplus kinetic energy generated during motor deceleration into sinusoidal AC power and returns it to the utility grid. By feeding energy back to the mains supply rather than dissipating it through braking resistors, the unit reduces electrical energy consumption and limits internal cabinet thermal loads to a dissipation of 400 W under nominal rating. The module delivers a regulated 750 V DC intermediate bus voltage with a continuous DC current rating of 32 A and supports short-term peak overloads up to 22.5 kW (40 A peak mains current) for 60 seconds.
Integrating the module into a drive line requires connecting the AC mains supply, DC bus link, and fieldbus networking components. Communication with drive controllers and higher-level automation systems is established through an integrated Lenze CAN System Bus running at speeds up to 500 kbit/s, along with a plug-in FIF automation slot that accommodates optional fieldbus adapters such as PROFIBUS (EMF2133IB or EMF2131IB) and INTERBUS (EMF2102IB). When replacing a failed unit, parameter settings stored in non-volatile EEPROM—which holds up to four parameter sets—must be restored using the Keypad XT (EMZ9371BC) or Lenze Global Drive Control (GDC) software tool. A replacement unit is not plug-and-play and requires parameter alignment and bus address setup before commissioning. ABC Industrial Parts can assist maintenance teams with tested spare modules and parameter extraction from existing units.
Status evaluation is provided directly on the front panel via LED indicators. A solid green LED confirms active operation and normal mains voltage, while a flashing green LED indicates a ready state; a solid red LED signals an active fault trip triggered by protection circuits or hardware errors. Detailed diagnostic data, including fault codes readable through parameter C0168 via GDC software or the Keypad XT, helps isolate issues such as mains phase loss (LP), intermediate bus overvoltage (OU), undervoltage (LU), and thermal overload conditions (OH, OH4, OC5). Short circuit faults (OC1) or internal hardware errors (H10, H11, EER, Sd) point to internal driver, power section, or EEPROM failures that cannot be serviced in the field. When internal faults bring production lines to a halt, sourcing a fully tested replacement module from ABC Industrial Parts provides a fast route back to full operation.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EMB9342-E |
| Model / Type | EMB9342-E |
| Component Type | Regenerative Supply and Feedback Module |
| Product Family | 9300 System |
| Series | 9340 |
| Rated Power | 15 kW |
| Peak Power | 22.5 kW |
| Mains Supply Voltage Range | 320 - 528 V AC |
| Rated Mains Current | 27 A |
| Peak Mains Current | 40 A |
| DC Bus Output Voltage | 750 V DC |
| Continuous DC Bus Current | 32 A |
| Power Dissipation | 400 W |
| Onboard System Bus Speed | 500 kbit/s |
Programming and Configuration
Configuration and parameter management for the Lenze EMB9342-E module are carried out using the optional Keypad XT (EMZ9371BC) or the Lenze Global Drive Control (GDC) software tool. System parameters, network addresses, and protective thresholds are saved directly to onboard non-volatile EEPROM memory, which supports storage for up to four complete parameter sets. Key parameters like fault code memory at parameter C0168 allow operators to inspect historical trip data and runtime diagnostics.
When replacing an existing supply module, configuration data must be transferred from the original unit or loaded from a backed-up software project. Because parameterization determines fieldbus node assignment, CANbus transmission rates, and monitoring limits, a replacement unit will not function correctly without loading the correct parameter file. Restoring saved parameter sets via GDC software or transferring memory structures ensures the replacement module matches original operating characteristics.
Communication and System Integration
The EMB9342-E module features an integrated Lenze System Bus (CAN interface) capable of operating at communication speeds up to 500 kbit/s. This bus link enables real-time synchronization, status word transmission, and parameter exchange across connected Lenze 9300 series drive controllers in multi-axis motion control applications.
To integrate into broader factory networks, the module includes an integrated FIF automation slot designed to accept plug-in communication modules. Supported options include PROFIBUS-DP interfaces (EMF2133IB and EMF2131IB) as well as INTERBUS interface modules (EMF2102IB). Proper network operation requires verifying node addresses, confirming matching baud rates, and ensuring proper 120-Ohm bus termination resistors are placed at the end nodes of the CAN network.
Diagnostics and Status Indication
Visual status diagnostics are available via two front-panel LED indicators. Diagnostic status word inspection can also be performed across the CAN system bus or fieldbus network to evaluate real-time operating conditions.
Fault logging and live diagnostic values are accessed using parameter C0168 through either the Keypad XT unit or the GDC programming tool. This enables technicians to distinguish between supply network disturbances, line phase loss, temperature warnings, and internal hardware failures.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Green LED (Operation) | Green - Solid / Flashing | Mains voltage OK and unit in operation / controller enable active. Flashing indicates ready status. |
| Red LED (Trip) | Red - Solid | Fault trip active. Internal hardware errors or protection trips trigger this LED. |
Replacement and Spare Part Considerations
When substituting a defective Lenze EMB9342-E module, ensure that the physical part number and electrical ratings match the original installation. This model is rated for 15 kW continuous power output, 27 A AC mains input, and a 32 A continuous DC bus output across a 320 to 528 V AC voltage range. Substituting a module with insufficient power capacity will result in thermal overloads or overcurrent trips under load.
Prior to putting a replacement module into service, all parameter sets must be downloaded to the unit's internal EEPROM memory via GDC software or Keypad XT. Fieldbus option cards installed in the FIF slot, such as PROFIBUS or INTERBUS modules, must be transferred from the original unit or verified for contact integrity. Ensure that CANbus termination switches or external 120-Ohm resistors match original bus topology to prevent network communication errors.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OH | Heatsink Overtemperature | Heatsink temperature exceeds permissive operating limit (>85°C) | Cooling fan failed, heatsink dirty, ambient temperature too high, continuous overload | Clean heatsink fins, verify operation of cooling fan, reduce cabinet ambient temperature |
| OH4 | Cabinet Inside Overtemperature | Internal temperature inside the supply module exceeds threshold | Inadequate cabinet ventilation, internal fan failure | Improve enclosure cooling, inspect internal module airflow |
| OU | DC Bus Overvoltage | Intermediate circuit DC bus voltage exceeded maximum threshold (~790-800 V DC) | Excessive braking energy feeding back faster than mains absorption capacity, line voltage spike | Check AC mains supply impedance, check mains supply connection and fusing |
| LU | DC Bus Undervoltage | Intermediate circuit DC bus voltage dropped below minimum operating limit | AC mains supply interrupted, line phase failure, blown line fuse | Check line supply voltage, inspect mains fuses and line contactor |
| OC1 | Short Circuit | Overcurrent trip / short circuit detected in power circuit | Short circuit in DC bus connections, short circuit in power semiconductor, earth fault | Check DC bus wiring and connected drive modules for short circuit. Internal hardware fault if fault persists with DC bus disconnected — return unit for repair. |
| OC5 | I x t Overload | Thermal overload threshold exceeded based on current integration (I x t) | Continuous current demand exceeds rated continuous capacity of 32 A DC / 27 A AC | Reduce connected drive loading or upgrade to larger supply module (e.g. EMB9343-E) |
| LP | Line Phase Loss | Failure or missing phase detected on 3-phase AC input supply | Unbalanced AC supply, single-phasing, blown input fuse, loose terminal block connection | Check AC input voltages on all 3 phases (L1, L2, L3) at module input terminals |
| CE0 | Communication Error Automation Slot | Communication failure between control board and plug-in fieldbus module in FIF slot | Loose fieldbus option card, defective option card, bad contact | Reseat communication card, check fixing screws. Internal hardware fault on option interface if error persists — replace option module or unit. |
| CE1 | System Bus (CAN) Communication Fault | CANbus line fault or timeout on system bus network | Cable breakage, incorrect bus termination resistors (120 Ohm missing), baud rate mismatch | Verify CAN cabling, check termination resistors at end nodes, confirm node addresses |
| EER | EEPROM Fault | Internal EEPROM memory read or write error during initialization or save operation | Corrupted non-volatile memory or failed EEPROM memory component | Internal hardware failure — reload default factory parameters. If fault persists, return unit for repair. |
| H10 | Internal Hardware Error | Self-test failure on control circuit or gate driver board | Internal circuit board malfunction or component failure | Internal hardware failure — non-field-serviceable board fault; replace unit or return for repair. |
| H11 | Internal Power Section Fault | Power section monitoring trip or driver stage defect | Damaged IGBT bridge, power supply board failure | Internal hardware failure — return unit for factory repair or replace with equivalent unit. |
| Sd | Sensor Fault | Internal temperature sensor failure or open circuit | Defective internal NTC sensor or broken connection to control board | Internal hardware error — return unit for repair. |
Frequently Asked Questions
What is the function of the Lenze EMB9342-E supply and feedback module?
The EMB9342-E supplies a regulated 750 V DC intermediate bus for multi-axis drive systems and returns excess kinetic braking energy back to the 3-phase AC mains supply, eliminating the need for braking resistors and reducing overall energy consumption.
What programming software or keypads are compatible with the EMB9342-E?
The module is configured and diagnosed using Lenze Global Drive Control (GDC) software or the Keypad XT (part number EMZ9371BC).
Which fieldbus communication modules are supported by the EMB9342-E?
Through its built-in FIF automation slot, the module supports optional PROFIBUS-DP modules (EMF2133IB / EMF2131IB) and INTERBUS modules (EMF2102IB), in addition to its standard onboard CAN System Bus running at 500 kbit/s.
What steps are required when replacing a faulty EMB9342-E module?
A replacement unit requires uploading the application parameter sets stored in the original module's non-volatile EEPROM using GDC software or Keypad XT. Any plug-in fieldbus module in the FIF slot must also be transferred and bus addresses and terminations confirmed.
What does a solid Red LED trip indicator signify on the EMB9342-E?
A solid red LED indicates an active fault trip triggered by protection monitoring or internal hardware errors, which can be diagnosed via parameter C0168.
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