Lenze 335032 4901VP.1B Keypad Operating Panel
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Product Information
The Lenze 335032 (model 4901VP.1B) is a plug-in keypad operating panel within the Lenze 4900 Series, designed to provide local parameterization, real-time monitoring, and direct operational control for Lenze variable frequency drives. Positioned on the front of host inverter units via a dedicated interface slot, this compact terminal features a clear LCD display with status indicators and integrated hardware navigation keys. Maintenance personnel and plant operators use the 335032 panel to enter speed target setpoints, initiate manual start and stop sequences, and navigate drive parameter menus directly on the shop floor without external software tools.
Connecting to the drive via an integrated multi-pin interface plug connector, the 4901VP.1B terminal draws power and communicates over the Lenze Internal Serial Protocol. Commissioning a replacement unit is straightforward due to a decoupled memory design. All drive operational parameters, modified menu settings, and configuration parameters reside in the non-volatile EEPROM memory of the host frequency inverter rather than inside the keypad itself. Replacing a damaged or unresponsive module requires simple physical swapping into the drive front slot without needing parameter re-downloading, software backup restoration, or drive re-configuration. ABC Industrial Parts can supply tested replacement panels to restore local panel interaction quickly.
Diagnostic information is made accessible directly through the LCD screen, allowing technicians to perform first-line troubleshooting without extra diagnostic equipment. The screen displays active operating states, motor output frequency, load current, and active error codes for instant feedback on system conditions. Basic operational checks should verify proper multi-pin connector seating and clean connection contacts within the host slot if the display fails to power on. Because the unit contains no serviceable internal electronics for field repairs, replacing a faulty terminal or utilizing an exchange module through ABC Industrial Parts provides a fast route to restoring local control and diagnostic visibility.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 335032 |
| Model / Type | 4901VP.1B |
| Component Type | Keypad Operating Panel |
| Product Family | 4900 Series |
| Display Type | LCD display with status indicators |
| Mounting Type | Plug-in front panel mounting / drive interface slot |
| Connector Type | Multi-pin plug connector |
| Communication Protocol | Lenze Internal Serial Protocol |
| Lifecycle Status | Obsolete |
Programming and Configuration
The Lenze 335032 keypad operating panel enables local parameter configuration and menu navigation directly on the machine without requiring a laptop or external engineering software. Through tactile hardware navigation keys, technicians can adjust target values, modify drive operating parameters, and configure drive functions locally.
Parameter storage is fully decoupled between the keypad panel and the host controller. All parameters modified via the 4901VP.1B panel are written directly to the non-volatile EEPROM memory inside the host frequency inverter. This ensures that parameter settings remain intact inside the drive even if the keypad operating panel is disconnected or replaced.
Communication and System Integration
The 4901VP.1B operating module features a direct multi-pin plug connector designed for front-panel insertion into host Lenze drive slots. Electrical power and communication signals are routed entirely through this interface, eliminating the need for external power supplies or interconnecting field cables.
Communication between the keypad panel and the inverter processor is established using the Lenze Internal Serial Protocol. The module is compatible with dedicated Lenze 4900 series operating slots as well as compatible interface slots on Lenze 8200 series frequency inverters.
Diagnostics and Status Indication
Diagnostic capabilities on the Lenze 335032 unit center around its LCD screen and integrated status indicators. During routine drive operation, the display presents live feedback on critical drive variables, including actual output frequency, motor current, and operating state.
In the event of a drive trip or fault condition, the 4901VP.1B panel displays active error codes directly on the LCD screen. This instant visibility enables maintenance personnel to identify fault conditions and initiate targeted troubleshooting without connecting external diagnostic software.
Replacement and Spare Part Considerations
The Lenze 335032 keypad terminal (type 4901VP.1B) holds an obsolete lifecycle status from the original manufacturer, making functional spare units crucial for maintaining legacy equipment in material handling, packaging machinery, textile processing, and general industrial maintenance applications.
When installing a replacement 4901VP.1B panel, no parameter transfer or software download is necessary. The decoupled architecture ensures that the target inverter retains all program settings in its internal memory, allowing plug-and-play module swapping to minimize machine downtime.
Before installation, inspect the multi-pin connector pins on both the keypad terminal and the host drive interface slot to ensure clean, unbent connections. Ensuring full mechanical seating into the drive slot secures both electrical power and serial communication.
Frequently Asked Questions
Is parameter re-programming required when replacing a Lenze 335032 keypad?
No, re-programming is not required. Drive parameters are stored directly within the host frequency inverter's non-volatile EEPROM memory, allowing the 4901VP.1B keypad to be swapped without re-downloading parameter sets.
Which drive series are compatible with the Lenze 4901VP.1B operating panel?
The 4901VP.1B operating panel is designed for host drives with Lenze 4900 series operating slots and Lenze 8200 series frequency inverters equipped with a compatible interface slot.
How does the Lenze 335032 connect to the host drive?
The unit features a multi-pin plug connector that plugs directly into the host drive's dedicated front interface slot, supplying both power and serial communication directly from the inverter.
What diagnostic information can be viewed on the 4901VP.1B LCD display?
The LCD display presents real-time drive variables such as output frequency, motor current, operating status, and active fault or error codes.
Does the Lenze 335032 keypad require external engineering software for basic setup?
No external software is needed for basic operation. Parameter navigation, speed setpoint adjustments, and start/stop controls can be executed directly using the keypad hardware keys.
Take advantage of our exchange formula
A defective product does not have to be worthless. At ABC Industrial Parts, you can hand in defective products and immediately benefit from a discount on your new purchase. This is a smart way to save money while contributing to a circular economy.
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Industrial plants prefer to keep running invariably, no matter what. Therefore, it is essential that you can rely on high-quality products and/or sustainable repairs. With our warranty conditions, you can count on certainty, whether you choose new, used or repaired products.
Data backup and recovery
Have you lost valuable parameters or data due to a malfunction while the manufacturer no longer provides support? At ABC Industrial Parts, we help you secure this data, both for common and specific products.
Specific firmware and hardware versions
If you are working with specific hardware or firmware versions that are no longer available from the manufacturer, ABC Industrial Parts is your partner. When making your enquiry, clearly state which versions you need, we will then look at the possibilities of supplying those versions, so that your installations continue to function optimally.
Disclaimer:
We are not an authorised distributor of Lenze.
Product photos are for illustration purposes only and may differ from the actual product delivered.
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