Lenze E94APNE0104 DC Supply Unit – Automation System 9400 10kW Power Module
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Product Information
The Lenze E94APNE0104 is a passive DC supply unit belonging to the Lenze Automation System 9400 series. Operating across a 3-phase AC input supply range of 320 V AC to 528 V AC at 45 to 65 Hz, this 10 kW module converts mains AC voltage into a regulated 565 V DC to 675 V DC bus output with a rated output current of 23 A and a rated input current of 21 A. Designed to deliver centralized line power across a shared DC bus (+UG/-UG), the unit powers single-axis or multi-axis Lenze 9400 HighLine servo drive setups while optimizing control cabinet space and simplifying wiring in packaging machinery, material handling systems, textile manufacturing, and automotive assembly lines.
Interfacing with the drive topology through heavy-duty mains terminals and shared DC bus bars, the module incorporates an integrated brake chopper transistor. Connecting an external braking resistor across its dedicated terminals allows safe dissipation of regenerative braking energy generated during heavy motor deceleration. Replacing a unit relies on standard physical and electrical mounting, provided critical safety protocols are followed, including a mandatory wait time of 3 to 5 minutes minimum to permit internal capacitors to discharge after line power disconnection. Parameter monitoring and system diagnostics are fully supported through Lenze Engineer software and the Lenze EASY Starter tool, with ABC Industrial Parts available to supply tested replacement hardware for fast system restoration.
Real-time operational status is displayed on the front panel by dual status LEDs: a solid green RDY indicator confirming DC bus voltage is within limits, and a solid red ERR indicator signaling fault conditions such as overvoltage, undervoltage, thermal overload, or hardware failure. External automation systems receive state updates via built-in potential-free Ready/Error relay output contacts. When persistent faults such as heat sink overtemperature (OH), DC bus overvoltage (OU), or undervoltage (LU) occur and external checks on line fuses, cooling airflow, or brake resistors do not resolve the issue, internal hardware faults may require replacing the power module, where an exchange unit from ABC Industrial Parts offers a dependable path back to full production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | E94APNE0104 |
| Model / Type | DC Supply Unit |
| Product Family | Automation System 9400 |
| Rated Power Output | 10 kW |
| Nominal Input Supply Voltage | 3x 400 / 480 V AC |
| Input Voltage Range | 320 - 528 V AC |
| Mains Frequency Range | 45 - 65 Hz |
| Rated Input Current | 21 A |
| Nominal Output Voltage Range | 565 - 675 V DC |
| Rated Output Current | 23 A |
Programming and Configuration
The Lenze E94APNE0104 DC supply unit is integrated into the machine control configuration using Lenze Engineer software and the Lenze EASY Starter diagnostic tool. Operating as a passive line module, primary operational settings and supply state checks are accessed through the host Lenze 9400 HighLine servo drive connected to the shared DC bus.
During commissioning, parameters within the drive software are set to evaluate the potential-free Ready/Error relay contact signals sent by the power supply. Using EASY Starter, field service technicians can observe live DC link voltage levels and review status records communicated from the supply module across the internal drive network.
Diagnostics and Status Indication
Visual status monitoring for the Lenze E94APNE0104 is located directly on the module front panel using two dedicated LED indicators. The green RDY LED illuminates continuously when the DC bus voltage is stabilized within normal operating parameters, signifying readiness for drive operation.
In a fault event, the red ERR LED turns solid while the internal potential-free relay contact alters its switching state to signal an error to higher-level controllers. Detailed diagnostic tracking and historical fault reporting can be monitored through a connected drive axis using Lenze EASY Starter software.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| RDY (Ready) | Green - Solid | DC bus voltage is within operating range and unit is ready for operation |
| ERR (Error / Fault) | Red - Solid | Fault condition detected such as overvoltage, undervoltage, thermal overload, or hardware fault |
Replacement and Spare Part Considerations
Replacing an E94APNE0104 unit requires ensuring that the donor unit matches the exact model number and 10 kW continuous power rating required for the multi-axis drive group. Because physical dimensions and mounting orientation align across the series, standard hardware swap methods apply directly.
Safety procedures are paramount during replacement: main AC power must be disconnected and locked out, followed by a mandatory wait time of 3 to 5 minutes minimum to allow internal energy storage capacitors to discharge completely. Always measure voltage across the +UG and -UG terminals with a calibrated multimeter before touching connections.
Once installed, verify that 3-phase AC line connections, DC bus link bars, external braking resistor wiring, and the potential-free relay contacts are secured before restoring line voltage and re-enabling connected servo drives.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| Overtemperature / OH | Heat Sink Overtemperature | Temperature of internal heat sink exceeded maximum threshold. | Insufficient cabinet cooling, fan failure, ambient temperature too high, or sustained overload. | Check control cabinet ventilation, clean cooling fins, check external ambient temperature, reduce load. |
| Overvoltage / OU | DC Bus Overvoltage | DC link voltage exceeded upper threshold limit. | Regenerative braking energy exceeds brake chopper capacity or external brake resistor not connected / defective. | Check external brake resistor resistance and connections; verify brake chopper operation. |
| Undervoltage / LU | DC Bus Undervoltage / Mains Failure | DC link voltage fell below minimum required operating threshold. | Mains supply failure, blown line fuse, phase loss, or low input AC voltage. | Check mains AC supply lines, phase voltages, and upstream protection fuses. |
Frequently Asked Questions
What is the input voltage range for the Lenze E94APNE0104 DC supply unit?
The module accepts a 3-phase AC input nominal voltage of 3x 400 / 480 V AC, with an allowable operating range of 320 V AC to 528 V AC at 45 to 65 Hz.
How long must I wait after powering off before servicing the E94APNE0104?
You must wait a minimum of 3 to 5 minutes after disconnecting power to permit internal capacitors to discharge safely before working on terminals or replacing the unit.
How does the integrated brake chopper function on this module?
The integrated brake chopper transistor monitors the DC bus voltage and routes excessive regenerative braking energy to an externally connected braking resistor during motor deceleration.
What software tools are used to diagnose the Lenze E94APNE0104?
Diagnostics and parameter tracking are conducted using Lenze Engineer software or the Lenze EASY Starter diagnostic tool through a connected Lenze 9400 HighLine drive axis.
What do the front-panel status LEDs indicate?
A solid green RDY LED indicates that the DC bus voltage is within operating range and ready. A solid red ERR LED indicates a fault condition such as overvoltage, undervoltage, thermal overload, or hardware failure.
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Specific firmware and hardware versions
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Disclaimer:
We are not an authorised distributor of Lenze.
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