Lenze 33721114 Print 33.7211-14 Control Board
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Product Information
The Lenze 33721114 (Print 33.7211-14) is an internal control printed circuit board designed for legacy Lenze variable speed drive controllers and speed regulators. Serving as a central signal processing and regulation unit within the drive assembly, this control board coordinates internal feedback loops, switching commands, and interface signal paths required for motor speed control. It is constructed with internal edge connectors and pin headers, allowing it to integrate directly into mature Lenze drive architectures across applications in material handling, packaging, and textile machinery.
Connecting the board to the drive system relies on PCB edge connectors and terminal pin headers that link the control terminals to the drive's internal power section. Putting a spare unit into service requires matching the analog setup of the original card, as configuration is managed physically through onboard hardware potentiometers and jumpers. Technicians preparing a replacement should record the original potentiometer positions and jumper positions prior to removal, allowing fine-tuned voltage and current feedback adjustments to be replicated on the replacement board. ABC Industrial Parts provides tested spare boards to assist maintenance teams in recovering operation without needing to redesign the control cabinet.
Internal electronic control boards are not field-repairable at the component level during an active machine breakdown, making board replacement or a tested exchange unit the fastest route back to production. Before handling or installing the replacement circuit board, standard high-voltage discharge safety procedures must be observed on the host drive equipment to prevent electrical hazards and damage to sensitive onboard components. Verifying correct jumper settings and matching potentiometer positions during installation prevents improper feedback regulation and restores reliable motor control. ABC Industrial Parts offers support with fully compatible replacement units to keep mature industrial machinery operational.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 33721114 (33.7211-14) |
| Model / Type | Print 33.7211-14 |
| Module Type | Control Printed Circuit Board (Steuerprint) |
| Interface Type | PCB Edge Connector / Terminal Pin Header |
| Configuration Method | Hardware Potentiometers / Analog Hardware Tuning |
| Lifecycle Status | Discontinued |
Programming and Configuration
The Lenze 33721114 control board does not require external software tools or digital programming. All operational tuning is performed entirely directly on the hardware using onboard potentiometers and jumper links integrated onto the printed circuit board.
To achieve accurate signal regulation for voltage and current feedback loops, the replacement module must be configured to match the original board's analog settings. Recording the positions of each potentiometer dial and verifying all jumper bridge placements before removing a faulty card allows technical staff to replicate the setup accurately on the replacement board.
Communication and System Integration
Internal system integration and signal connections on the Lenze 33.7211-14 board are established via PCB edge connectors and terminal pin headers. These hardware interfaces route commands and regulation signals directly between the external control terminals and the internal power stage of the host drive.
This direct hardware coupling enables a straightforward swap inside compatible Lenze drive housings. Proper mechanical seating along the internal mounting guide rails ensures reliable electrical connection for regulation loops and switching commands.
Replacement and Spare Part Considerations
As the Lenze 33721114 (Print 33.7211-14) is discontinued by the manufacturer, sourcing direct hardware replacement boards is essential for extending the operational lifetime of existing variable speed drive systems. Utilizing a drop-in spare prevents the high capital expense and extended downtime associated with complete drive cabinet retrofits.
Prior to removing or installing an internal board, technical personnel must isolate the drive from main power supplies and follow high-voltage discharge safety protocols. Ensuring that all hardware potentiometers and jumper links are aligned with the original board configuration prevents drive instability upon power-up.
Frequently Asked Questions
What is the primary function of the Lenze 33721114 control board?
The Lenze 33721114 (Print 33.7211-14) is an internal control printed circuit board that serves as the central signal processing unit in legacy Lenze variable speed drives, regulating feedback loops and switching commands for accurate motor control.
How is the replacement Lenze 33.7211-14 board adjusted during installation?
Configuration is performed physically on the board via onboard potentiometers and jumpers. Technicians must record the potentiometer positions and jumper configurations from the original board and set the replacement unit identically.
Is the Lenze 33721114 control board still produced by Lenze?
No, the Lenze 33721114 is discontinued by the manufacturer. Sourcing replacement spare boards allows facilities to maintain operational drive controllers without replacing complete control cabinets.
What safety measures are needed when replacing this drive card?
Because the board mounts inside the drive housing, standard high-voltage safety procedures must be followed, including disconnecting main power and ensuring internal drive capacitors are completely discharged prior to handling.
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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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