Control Techniques MDB-STICK Modbus RTU Communication Adapter
The Control Techniques MDB-STICK is a compact, plug-in communication accessory designed to equip Unidrive M and Commander C series variable frequency drives (VFDs) with a dedicated RS485 serial interface. By slotting directly into the front option bay of the drive, this Modbus RTU adapter enables seamless integration with industrial networks, PLCs, HMIs, and PC-based commissioning software (such as Connect or Machine Control Studio) without requiring a bulky, external communication module or additional external power supply.
Key Specifications & Drive Compatibility
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Part Number: MDB-STICK
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Manufacturer: Control Techniques (Nidec)
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Communication Protocol: Modbus RTU (RS485)
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Physical Connector: RJ45 port
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Baud Rates: Supports standard communication speeds up to 115,200 bps
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Compatible Drives: Unidrive M100, Unidrive M101, Unidrive M200, Unidrive M201, Unidrive M300, Commander C200, Commander C300
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Regulatory Standards: CE, UL listed, RoHS compliant
Seamless Automation Integration and PC Commissioning
The primary industrial benefit of the MDB-STICK is its ability to instantly open a low-cost digital communication channel to the drive. Inserting the stick allows users to:
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Perform PC-Based Commissioning: Connect a PC running Control Techniques’ Connect software via a standard USB-to-RS485 cable to rapidly configure, back up, clone, and monitor drive parameters in real time.
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Establish PLC & HMI Connectivity: Run Modbus RTU query-response networks to read drive diagnostics (output frequency, motor current, active trips) and write control commands directly from centralized PLCs or touchscreens.
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Network Multi-Drive Systems: Daisy-chain multiple drives on a single RS485 network line using standard RJ45 patch cables to synchronize starting, stopping, and speed references across a shared production line.
Zero-Footprint, Rugged Construction
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Plug-and-Play Architecture: Slides directly into the integrated accessory slot on the face of the drive. The control host automatically detects the stick and enables the corresponding serial communication parameter menus.
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Compact Integration: Fits entirely within the drive envelope, preserving the IP20 enclosure rating and eliminating extra depth requirements inside congested electrical control cabinets.
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Industrial Noise Immunity: Features optical isolation and balanced differential signaling characteristics inherent to RS485, preventing electromagnetic interference (EMI) from disrupting critical control data in heavy-machinery environments.
Recommended Industrial Applications
By bringing low-cost network mapping to compact drives, the MDB-STICK is ideal for:
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Multi-drive packaging and labeling conveyor lines
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Distributed HVAC fan, blower, and damper control networks
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Water and wastewater pump systems requiring centralized SCADA logging
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OEM machine builds using centralized PLCs with Modbus RTU master capabilities
Our commercial division is standing by to assist with network compatibility checks, live stock availability, and global shipping logistics.
