Description
🔧 Product Overview
The BALDOR MDH4A02TB-RN23 is a single-axis MintDrive II integrated motion controller and AC servo drive designed for industrial motion-control applications. It combines servo control and drive functions in one compact unit and is intended for systems requiring accurate position, velocity, and torque control.
This model belongs to the MintDrive II family and is configured for a 230–460 VAC three-phase input, with a 2.5 A continuous motor current rating. The model designation also identifies resolver feedback and an external 24 VDC logic supply configuration.
The MDH4A02TB-RN23 is suitable for maintaining legacy industrial motion systems where an exact drive configuration is required. Before replacement, the complete catalog number should be matched because MintDrive II units are available with different voltage ratings, current capacities, feedback options, braking arrangements, and communication configurations.
⚙️ Key Features
- Brand: Baldor
- Model: MDH4A02TB-RN23
- Series: MintDrive II
- Product Type: Integrated Motion Controller and Servo Drive
- Number of Axes: 1 Servo Axis
- Input Voltage: 230–460 VAC
- Input Phase: Three-Phase
- Input Frequency: 50/60 Hz
- Continuous Output Current: 2.5 A RMS
- Peak Output Current: Approximately 5 A RMS
- Motor Technology: AC Servo
- Feedback Type: Resolver
- Logic Supply: External 24 VDC
- Serial Communication: RS-232 / RS-485
- CAN Communication: Dual CAN configuration
- Motion Control: Linear interpolation
- Digital and analog I/O support
- Diagnostic display
The MintDrive II family combines a programmable motion controller with a brushless AC servo drive, allowing a single unit to manage both motion calculations and motor power control.
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | Baldor |
| Model | MDH4A02TB-RN23 |
| Series | MintDrive II |
| Product Name | Integrated Motion Controller and Servo Drive |
| Drive Type | AC Servo Drive |
| Number of Axes | 1 Servo Axis |
| Input Voltage | 230–460 VAC |
| Input Phase | Three-Phase |
| Input Frequency | 50/60 Hz |
| Continuous Output Current | 2.5 A RMS |
| Peak Output Current | Approx. 5 A RMS |
| Motor Output Power | Approx. 1.9 kVA |
| Feedback Type | Resolver |
| Logic Supply | External 24 VDC |
| Communication | RS-232 / RS-485 |
| CAN Interface | Dual CAN / CANopen Capability |
| Digital Inputs | Up to 18 Optically Isolated Inputs |
| Digital Outputs | Up to 9 Optically Isolated Outputs |
| Analog Inputs | 4 Channels |
| Analog Outputs | 4 Channels |
| Output Frequency | 0–500 Hz |
| Switching Frequency | Approx. 8 kHz |
| Braking Configuration | Model-dependent braking configuration |
| Diagnostic Display | Seven-Segment Display |
| Approximate Dimensions | 152 × 203 × 102 mm |
| Approximate Weight | 2.3 kg |
| Country of Manufacture | United Kingdom |
The MDH4A02 family is documented as a 230–460 VAC three-phase drive with a 2.5 A continuous output rating. Published MintDrive II specifications also list approximately 5 A peak phase current, 1.9 kVA nominal output, output frequency up to 500 Hz, and approximately 8 kHz switching frequency for the 2.5 A MDH4 configuration.
🧠 Model Number Explanation
The catalog number provides useful information about the drive configuration:
MDH4A02TB-RN23
- MDH — MintDrive II family
- 4 — 230–460 VAC three-phase input
- A02 — 2.5 A continuous current rating
- T — Integrated AC power supply configuration
- B — Regenerative braking configuration
- R — Resolver feedback
- N — No additional fieldbus option indicated
- 23 — Combined RS-232 / RS-485 serial interface with external 24 VDC logic supply
The catalog-number coding should still be checked against the unit nameplate before installation because suffix configurations can be important when replacing a legacy servo drive.
⚡ Servo Control Functions
The MintDrive II platform is designed for advanced industrial motion control.
Typical functions include:
- Position control
- Velocity control
- Torque control
- Point-to-point positioning
- Linear interpolation
- Electronic gearing
- Electronic cam functions
- Motion synchronization
- Position capture
- Programmable motion sequences
- Servo tuning and configuration
The integrated controller allows the drive to perform motion-control tasks without requiring all calculations to be handled by an external PLC or dedicated motion controller.
🔌 Communication and I/O
The MDH4A02TB-RN23 supports communication and I/O functions required for integration into industrial machinery.
The MintDrive II platform includes:
- RS-232 serial communication
- RS-485 serial communication
- CAN communication capability
- CANopen support
- Digital inputs
- Digital outputs
- Analog inputs
- Analog outputs
The general MintDrive platform provides up to 18 optically isolated digital inputs and 9 optically isolated digital outputs, together with four analog input channels and four analog output channels. Actual system use depends on the model configuration and external wiring.
🏭 Typical Applications
The BALDOR MDH4A02TB-RN23 can be used in motion-control systems such as:
- Packaging machinery
- CNC and automated machinery
- Semiconductor equipment
- Material handling systems
- Robotics
- Precision positioning equipment
- Automated assembly systems
- Printing equipment
- Labeling machines
- Industrial production equipment
The 230–460 VAC three-phase configuration makes the MDH4 series suitable for industrial systems using higher-voltage AC servo motors.
🛠️ Installation Guidelines
Before replacing or installing the drive:
- Disconnect all incoming power.
- Allow sufficient time for internal DC bus capacitors to discharge.
- Follow lockout and tagout procedures.
- Confirm the complete model number.
- Verify the 230–460 VAC three-phase supply.
- Check motor compatibility.
- Confirm resolver feedback wiring.
- Verify the external 24 VDC logic supply.
- Inspect the motor power cable.
- Confirm grounding connections.
- Check braking configuration.
- Record existing drive parameters where possible.
- Restore power and perform commissioning checks.
Incorrect feedback wiring, motor phase wiring, or parameter configuration can cause unstable motor operation.
🔍 Maintenance and Inspection
Before installing a used or surplus drive, inspect:
- Front-panel condition
- Cooling surfaces
- Power terminals
- Motor terminals
- Ground terminals
- Feedback connectors
- Communication connectors
- I/O connectors
- Capacitors
- Signs of overheating
- Corrosion
- Previous repair marks
- Product label and model number
Keep the drive in clean and dry storage conditions when not installed.
For critical equipment, record:
- Complete catalog number
- Serial number
- Firmware information
- Motor configuration
- Existing parameter settings
- Host machine location
🔄 Compatibility Notes
The safest replacement identification is:
BALDOR → MintDrive II → MDH4A02TB-RN23
Do not select a replacement solely by comparing the current rating.
The following characteristics should also match:
- Input voltage range
- Number of phases
- Continuous current rating
- Feedback type
- Logic power configuration
- Communication interface
- CAN or fieldbus configuration
- Braking configuration
- Motor type
- Firmware and parameter requirements
A different MintDrive II unit may have the same physical appearance but still be incompatible with the existing machine configuration.
❓ Common Questions & Answers
❓ What is the BALDOR MDH4A02TB-RN23?
It is a MintDrive II integrated motion controller and AC servo drive designed for single-axis industrial servo applications.
❓ What input voltage does this model require?
The MDH4A02 series is designed for 230–460 VAC three-phase power at 50/60 Hz.
❓ What is the continuous output current?
The MDH4A02 configuration is rated for 2.5 A RMS continuous output current.
❓ What type of motor feedback does this version use?
The R designation identifies a resolver feedback configuration.
❓ Does it require an external 24 VDC power supply?
Yes. The suffix configuration of this model identifies an external 24 VDC logic supply arrangement.
❓ Does the drive support RS-232 communication?
Yes. The MintDrive II platform supports serial communication, including RS-232 and RS-485 configurations.
❓ Can another MintDrive II replace this unit?
Not automatically. Input voltage, current rating, feedback type, braking arrangement, logic supply, and communication configuration must all be checked before replacement.
🧩 Recommended Related BALDOR Models
- BALDOR MDH4A02TB-RN23
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📌 Product Identification
Brand: Baldor
Model: MDH4A02TB-RN23
Series: MintDrive II
Product Name: Integrated Motion Controller and AC Servo Drive
Input: 230–460 VAC Three-Phase
Output Current: 2.5 A Continuous
Feedback: Resolver
Logic Supply: External 24 VDC
Application: Single-Axis Industrial Motion Control
🏷️ Recommended Short Title
BALDOR MDH4A02TB-RN23 | MintDrive II Servo Drive
🔍 Short Product Description
The BALDOR MDH4A02TB-RN23 is a MintDrive II single-axis integrated motion controller and AC servo drive for industrial motion applications. It operates from 230–460 VAC three-phase power and provides a 2.5 A continuous servo output. The unit uses resolver feedback, external 24 VDC logic power, serial communication, and integrated motion-control functions for position, velocity, and torque applications.
