Allen-Bradley 1756-DMD30 Drive Module – ControlLogix Programmable Automation Controller Platform
When a drive module fails mid-shift in a continuous process line — a paper mill, a water treatment plant, a petrochemical blending unit — the consequences are not merely inconvenient. Conveyor belts stop. Pumps lose synchronization. Batch processes abort. Every minute of unplanned downtime carries a measurable cost, and in many facilities that cost runs into thousands of dollars per hour. The 1756-DMD30 exists precisely to prevent that scenario: it is the dedicated interface between the ControlLogix backplane and the PowerFlex drive ecosystem, translating high-level motion commands into real-time drive control with the determinism that process-critical applications demand.
Within the ControlLogix 1756 platform — Rockwell Automation’s flagship modular PAC architecture deployed across tens of thousands of facilities worldwide — the 1756-DMD30 occupies a specialized role. Unlike general-purpose I/O modules, it is engineered exclusively for drive communication and coordination, supporting the DRIVE tag structure native to Logix 5000 firmware. This tight integration eliminates the latency and configuration overhead associated with third-party drive gateways, making it the preferred choice for OEMs and system integrators who need deterministic drive response within a unified Logix control environment.
Technical Specifications
Electrical
- Backplane Current Draw: 130 mA @ 5 VDC
- Power Dissipation: 0.65 W (maximum)
- Isolation: Backplane to drive interface — optically isolated
Mechanical
- Form Factor: Single-slot ControlLogix 1756 chassis module
- Dimensions: Standard 1756 module footprint
- Weight: Approximately 300 g
- Connector: 1756 backplane edge connector (keyed)
Environmental
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: -40 °C to +85 °C
- Relative Humidity: 5% to 95% non-condensing
- Vibration: IEC 60068-2-6 compliant
- Shock: IEC 60068-2-27 compliant
Certifications & Standards
- UL Listed
- CE Marked (EMC Directive)
- RoHS Compliant
- Compliant with IEC 61131-2 (Programmable Controllers — Equipment Requirements and Tests)
Key Features & Benefits
- Native Logix 5000 DRIVE Tag Integration — Eliminates custom add-on instruction development; drive parameters map directly to controller tags, reducing commissioning time by up to 40% compared to gateway-based architectures.
- Single-Slot Chassis Footprint — Maximizes chassis density in space-constrained control panels; one slot per drive axis preserves backplane slots for I/O expansion without requiring a separate drive communication chassis.
- Deterministic Backplane Communication — Operates on the ControlLogix scheduled backplane, ensuring drive command updates are synchronized with the controller scan cycle — critical for coordinated multi-axis applications.
- Hot-Swap Capable — Supports removal and insertion under power (RIUP) per ControlLogix platform design, enabling module replacement without full system shutdown and reducing maintenance windows.
- IEC 61131-2 Compliant Hardware Design — Meets international PLC hardware standards for electrical noise immunity, ensuring reliable operation in electrically harsh industrial environments including VFD-dense panels.
- Broad PowerFlex Drive Compatibility — Designed to interface with the PowerFlex drive family within the Logix architecture, providing a consistent programming model across multiple drive ratings and topologies.
Industry & Equipment Applications
- Oil & Gas — Pipeline pump stations, compressor skids, and wellhead control systems where drive-to-controller latency directly affects process safety and throughput.
- Pulp & Paper — Section drive coordination on paper machines (wire, press, dryer sections) requiring tightly synchronized speed references across multiple drive axes.
- Water & Wastewater — Variable-speed pump control in lift stations and treatment plants, where the module enables energy-optimized flow control under Logix supervisory logic.
- Automotive Manufacturing — Body-in-white conveyor systems and paint shop transport lines with multi-zone speed coordination managed from a single ControlLogix controller.
- Mining & Minerals — Belt conveyor drives, crusher motor control, and slurry pump systems operating in high-vibration, high-dust environments within ControlLogix-based SCADA architectures.
- Food & Beverage — Hygienic conveyor and mixer drive control in CIP-compatible installations, where the module’s deterministic response supports recipe-driven speed profiles under Logix batch control.
System Integration & Compatible Parts
Upstream Controllers (same chassis):
- 1756-L71, 1756-L72, 1756-L73, 1756-L74, 1756-L75 (ControlLogix 5570 processors)
- 1756-L81E, 1756-L82E, 1756-L83E, 1756-L84E, 1756-L85E (ControlLogix 5580 processors)
Chassis & Power Supplies:
- 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 (ControlLogix chassis)
- 1756-PA72, 1756-PB72 (AC/DC power supplies)
Compatible Drive Family:
- PowerFlex series drives (consult Rockwell Automation publication PFLEX-SG002 for specific model compatibility matrix)
Equivalent / Replacement Considerations:
- No direct drop-in equivalent exists within the ControlLogix platform; drive communication via EtherNet/IP (1756-EN2T + drive EtherNet/IP adapter) is a functional alternative but requires firmware and program modifications — not a transparent swap.
Our Quality Assurance Process
Every 1756-DMD30 unit sourced and supplied by Konmask.com passes through a structured four-stage verification process before shipment:
- Visual & Physical Inspection — Examination of PCB, connector pins, label integrity, and housing for damage, corrosion, or counterfeit indicators. Units with any anomaly are quarantined immediately.
- Firmware & Revision Verification — Catalog number, series letter, and firmware revision are confirmed against Rockwell Automation’s published revision history to ensure compatibility with current Logix firmware releases.
- Functional Bench Test — Where test infrastructure permits, modules are powered in a ControlLogix chassis and queried via RSLogix 5000 / Studio 5000 to confirm backplane recognition and module identity response.
- Packaging & ESD Protection — Units are packed in anti-static bags with foam cushioning and clearly labeled with catalog number, series, and revision. Shipment documentation is prepared per customer requirements.
Available Documentation: Test reports, photos of physical unit, original Rockwell Automation datasheet, certificate of conformance (on request), and commercial invoice for customs clearance.
How to Order
- Submit Your Inquiry — Send us the catalog number (1756-DMD30), required quantity, and any revision or firmware preferences via the contact form or email at support@konmask.com.
- Receive Quotation — Our team will respond within 24 hours with availability, lead time, and a formal quotation. Urgent requirements are flagged for same-day response.
- Confirm & Ship — Upon order confirmation, we arrange shipment via your preferred carrier with full tracking. Export documentation is prepared for international orders.
Why Choose Konmask.com?
- Specialized Industrial Automation Inventory — We focus exclusively on PLC, DCS, and drive components. This is not a general electronics distributor — every SKU in our catalog is an industrial control component.
- Verified Sourcing — All units are sourced through traceable supply channels. We do not list products we cannot physically verify or supply.
- Technical Pre-Sales Support — Our team can advise on compatibility, revision differences, and integration requirements before you commit to a purchase — not after.
- Global Export Experience — We handle export documentation, customs declarations, and international freight coordination for customers across Asia, Europe, the Middle East, and the Americas.
- Responsive Communication — 24-hour inquiry response commitment, with direct engineer-to-engineer communication available for complex technical requirements.
Frequently Asked Questions
Q: Is the Allen-Bradley 1756-DMD30 compatible with ControlLogix 5580 processors such as the 1756-L83E?
A: Yes. The 1756-DMD30 operates on the ControlLogix backplane and is compatible with both 5570 and 5580 series processors. The controller firmware version should be verified against Rockwell Automation’s Product Compatibility and Download Center (PCDC) to confirm the minimum required Logix firmware for your specific application.
Q: Can I replace a failed 1756-DMD30 without shutting down the entire ControlLogix chassis?
A: The ControlLogix platform supports Removal and Insertion Under Power (RIUP) for most 1756 modules, including the 1756-DMD30. However, the connected drive should be brought to a safe state (stopped, with appropriate safety interlocks engaged) before removing the module to prevent uncontrolled drive behavior during the swap.
Q: What is the difference between using a 1756-DMD30 and communicating with a PowerFlex drive over EtherNet/IP for ControlLogix drive integration?
A: The 1756-DMD30 uses the ControlLogix backplane for drive communication, providing deterministic, scan-cycle-synchronized data exchange without network infrastructure. EtherNet/IP-based drive integration (using a 1756-EN2T and a drive with an EtherNet/IP adapter) offers more flexibility and is suitable for distributed architectures, but introduces network-dependent latency and requires additional configuration. For tightly coordinated, chassis-local drive control, the 1756-DMD30 remains the more deterministic solution.
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