Lenze 33.8101E .33H 230V AC DR – 33 Series DC Motor Speed Controller
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Product Information
The Lenze 33.8101E (model designation .33H 230V AC DR) is a single-phase 1-quadrant thyristor DC motor speed controller from the Lenze 33 Series DC Controllers family. Designed for continuous variable speed regulation of small brushed DC motors, this compact drive converts a standard single-phase 230 V AC (50/60 Hz) mains input into an adjustable 0 to 180 V DC armature output supplying up to 1.5 A of continuous current. It delivers precise velocity control across light industrial applications, including continuous conveyor lines, packaging equipment, and dosing or metering pumps driven by 180 V DC permanent magnet motors.
Interface connection is made via screw terminals for power input, analog reference signals, and feedback devices. Setpoint commands are supplied through an external 10 kOhm speed potentiometer or an analog 0 to 10 V DC reference signal. Commissioning a replacement unit requires no software tools or programming cables. Drive calibration is performed directly on the circuit board using mechanical potentiometer trimmers to adjust minimum and maximum speed thresholds, acceleration ramp timing, armature current limits, and IxR compensation. Technical specialists at ABC Industrial Parts can assist in confirming unit specifications and selecting matching hardware settings for legacy drop-in replacements.
A board-mounted POWER / READY LED turns solid to indicate active mains voltage supply. First-line troubleshooting is supported by onboard hardware test points, allowing technicians to verify armature voltage and setpoint signal levels directly with a standard multimeter. Internal hardware issues are generally non-serviceable on the plant floor, making board substitution the primary method of minimizing downtime. Obtaining a tested replacement unit through ABC Industrial Parts provides a straightforward path to restore reliable machine operation.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 33.8101E |
| Model / Type | .33H 230V AC DR |
| Product Family | 33 Series DC Controllers |
| Component Type | DC Motor Speed Controller |
| Supply Voltage | 230 V AC |
| Supply Frequency | 50/60 Hz |
| Armature Output Voltage | 0 - 180 V DC |
| Continuous Armature Current | 1.5 A |
| Operating Mode | 1-Quadrant single-phase thyristor control |
| Speed Control Method | Armature voltage feedback with IxR compensation or tachogenerator feedback |
| Speed Setpoint Input | 0 - 10 V DC or 10 kOhm external potentiometer |
| Wiring Connections | Screw terminals |
Diagnostics and Status Indication
The Lenze 33.8101E includes onboard status and measurement features to simplify machine-side diagnostic checks. A dedicated LED indicator provides instant visual verification of mains power availability without opening external instrument panels.
Dedicated hardware test points on the circuit board enable quick multimeter measurement of setpoint input values and output armature voltage. This allows maintenance technicians to confirm whether the drive is properly responding to speed commands or if fault conditions stem from external load changes or incoming power irregularities.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| POWER / READY | Solid | Indicates active mains supply voltage applied to unit |
Replacement and Spare Part Considerations
Before installing a replacement 33.8101E drive, verify that the application requirements match a 230 V AC supply, up to 180 V DC armature voltage output, and a maximum continuous motor current of 1.5 A. Confirm whether the motor utilizes open-loop armature feedback with IxR compensation or closed-loop speed control via a DC tachogenerator, and wire the screw terminal interface accordingly.
Because this drive relies on hardware parameter adjustment, tuning must be matched manually on the replacement board. Measure or note the positions of all potentiometer trimmers on the old controller—including minimum speed, maximum speed, acceleration ramp time, current limit, and IxR compensation—and pre-set the replacement trimmers to equivalent positions prior to applying power.
Verify that all screw terminal connections are firmly secured and that the speed reference source, whether a 10 kOhm external potentiometer or a 0 to 10 V DC analog signal, is correctly wired to prevent sudden unexpected acceleration upon energization.
Frequently Asked Questions
How do you adjust speed and ramp settings on the Lenze 33.8101E?
All parameter adjustments are performed manually without software using integrated circuit-board potentiometer trimmers for minimum speed, maximum speed, acceleration ramp timing, current limit, and IxR compensation.
What speed setpoint inputs are supported by the 33.8101E drive?
The controller accepts either an external 10 kOhm potentiometer or an analog 0 to 10 V DC voltage reference connected directly to its screw terminals.
What motor specifications are suitable for the Lenze 33.8101E?
The 33.8101E is designed for small brushed DC motors operating on 0 to 180 V DC armature voltage with continuous current requirements up to 1.5 A.
Does the Lenze 33.8101E support closed-loop speed control?
Yes. The controller supports open-loop armature voltage feedback with IxR compensation as well as closed-loop speed regulation using a DC tachogenerator connected to the terminal strip.
How can you verify that mains power is supplied to the controller?
A solid status on the onboard POWER / READY LED indicates that active single-phase 230 V AC mains supply voltage is applied to the unit.
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Disclaimer:
We are not an authorised distributor of Lenze.
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