Allen-Bradley 1756-M16SE 16-Axis SERCOS Motion Control – ControlLogix Motion Coordinator Module
When a multi-axis servo system loses its motion coordinator, the consequences are immediate and costly: axes fall out of synchronization, CNC spindles halt mid-cycle, robotic arms freeze in undefined positions, and production lines go dark. Maintenance engineers scramble to identify whether the fault lies in the drive, the network, or the controller itself — and every minute of unplanned downtime compounds the loss. The Allen-Bradley 1756-M16SE exists precisely to prevent that scenario. It is the dedicated motion coordinator that keeps up to 16 SERCOS-networked servo axes running in tight, deterministic synchronization within the ControlLogix chassis.
Within the 1756 ControlLogix family, the 1756-M16SE occupies the top tier of multi-axis motion coordination. While the 1756-M02AE and 1756-M08SE handle smaller axis counts, the M16SE is the module of choice for complex, high-axis-count applications — coordinated gantry systems, multi-spindle machining centers, and synchronized web-handling lines — where a single motion coordinator must manage the full servo network without compromising cycle time or positional accuracy. Globally, ControlLogix motion platforms are deployed across automotive, semiconductor, packaging, and heavy industry, and the 1756-M16SE remains a cornerstone of those installations.
Technical Specifications
Electrical
- Backplane Current Draw: 1.0 A @ 5 VDC; 3.0 mA @ 24 VDC
- Power Dissipation: 5.0 W (maximum)
- SERCOS Interface: Fiber-optic ring, 2 Mbps / 4 Mbps / 8 Mbps / 16 Mbps selectable
- Maximum Controlled Axes: 16 axes per module
- Motion Update Rate: Configurable; minimum 1 ms servo loop
Mechanical
- Form Factor: Single-slot ControlLogix 1756 chassis module
- Dimensions: Standard 1756 module footprint
- Weight: Approximately 200 g
- Connectors: Dual fiber-optic ports (SERCOS ring in/out)
Environmental
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: -40 °C to +85 °C
- Relative Humidity: 5% to 95% non-condensing
- Vibration: IEC 68-2-6 compliant
- Shock: IEC 68-2-27 compliant
Certifications & Standards
- UL Listed; CE Marked; cUL Listed
- SERCOS I/II interface standard compliant
- IEC 61800-7 (SERCOS profile for drives and motion control)
- Note: Verify current certification status against Rockwell Automation publication 1756-TD001 before final design-in.
Key Features & Benefits
- 16-Axis Simultaneous Coordination — Manages up to 16 SERCOS servo axes from a single module slot, eliminating the need for multiple motion coordinators and reducing chassis real estate by up to 50% compared to multi-module alternatives.
- Deterministic SERCOS Fiber-Optic Network — The fiber-optic ring architecture provides inherent noise immunity in high-EMI environments (welding cells, large VFD installations), ensuring jitter-free command delivery that cable-based networks cannot guarantee.
- Sub-Millisecond Servo Loop Closure — Configurable servo update rates down to 1 ms enable tight velocity and position loop closure, supporting applications where positional repeatability within ±1 encoder count is a process requirement.
- Native RSLogix 5000 / Studio 5000 Integration — Motion instructions (MAM, MAS, MAJ, MAPC, etc.) are programmed directly in the Logix environment with no third-party motion software, reducing commissioning time and long-term maintenance burden.
- Electronic Camming & Gearing (IEC 61800-7 Compliant) — Built-in cam profile and electronic gearing functions support synchronized multi-axis motion without external cam controllers, directly satisfying IEC 61800-7 motion profile requirements.
- Hot-Swap Chassis Compatibility — Designed for the 1756 ControlLogix chassis, the module supports Rockwell’s redundancy and hot-swap architecture, enabling module replacement without full system shutdown in appropriately configured systems.
Industry & Equipment Applications
- Automotive Manufacturing — Body-in-white welding lines with coordinated servo gun positioning; transfer press lines requiring synchronized die cushion and slide motion across 8–16 axes.
- Semiconductor & Electronics — Wafer handling robots and pick-and-place gantries where sub-micron repeatability and deterministic motion timing are non-negotiable process parameters.
- Packaging & Converting — Horizontal form-fill-seal machines, rotary die cutters, and multi-lane cartoners where electronic camming replaces mechanical line shafts and allows rapid format changeover.
- Printing & Web Handling — Gravure and flexographic printing lines requiring tight register control across multiple print stations; tension-controlled unwind/rewind systems with dancer position feedback.
- CNC Machining & Metal Fabrication — Multi-spindle machining centers and laser cutting systems where coordinated X/Y/Z/A/B axis motion must maintain contouring accuracy at high feed rates.
- Material Handling & Robotics — Multi-axis gantry cranes, palletizing robots, and automated storage/retrieval systems (AS/RS) where coordinated motion across many axes determines throughput and positioning accuracy.
System Integration & Compatible Parts
Upstream (Controller & Chassis):
- 1756-L6x / 1756-L7x / 1756-L8x ControlLogix processors (Studio 5000 Logix Designer required)
- 1756-A7 / 1756-A10 / 1756-A13 / 1756-A17 ControlLogix chassis
- 1756-PA72 / 1756-PB72 chassis power supplies
Downstream (SERCOS Drives):
- Kinetix 6000 (2094-BCxx-Mxx) — primary SERCOS drive family for this module
- Kinetix 6200 / 6500 — verify SERCOS compatibility via Rockwell Knowledgebase
- Third-party SERCOS II-compliant drives (Bosch Rexroth IndraDrive, Siemens SIMODRIVE with SERCOS option)
Equivalent / Replacement Considerations:
- 1756-M08SE — 8-axis variant; direct drop-in if axis count requirement is ≤8; same firmware family
- 1756-M02AE — 2-axis analog servo; not a SERCOS replacement; requires drive and wiring changes
- Kinetix 5700 with 1756-EN2T EtherNet/IP — modern migration path; requires full drive replacement and Studio 5000 motion re-commissioning; not a plug-in substitute
Our Quality Assurance Process
- Visual & Physical Inspection — Each unit is examined for board-level damage, connector pin integrity, label authenticity, and firmware revision markings. Counterfeit indicators (incorrect label fonts, non-standard PCB color, mismatched date codes) result in immediate rejection.
- Functional Power-On Test — Module is seated in a live 1756 chassis and powered. Backplane communication, LED status sequence, and RSLinx device recognition are verified before any unit is accepted into stock.
- SERCOS Ring Loopback Test — Fiber-optic ports are tested for optical power output and ring closure integrity using calibrated test equipment, confirming the communication interface is fully operational.
- Documentation & Traceability — Test records are retained per unit. Upon request, we can provide: functional test report, inspection checklist, product photos (pre-shipment), and a certificate of conformance. Rockwell Automation factory repair certification (if applicable) is disclosed at time of inquiry.
How to Order
- Submit Your Inquiry — Contact us via the form on this page, email support@konmask.com, or call +0086 19859288691. Include your required quantity, target delivery date, and any specific firmware revision or condition requirements (new surplus, refurbished, factory repaired).
- Receive Your Quote — Our team reviews availability and responds within 24 hours with pricing, lead time, and available documentation. We source from verified distributors and OEM-authorized channels.
- Confirm & Ship — Upon order confirmation, units are re-inspected, securely packaged with anti-static protection, and shipped with full tracking. Export documentation for international shipments is prepared upon request.
Why Choose Konmask.com?
- Specialist Focus on Industrial Automation — We deal exclusively in PLC, DCS, servo, and motion control components. Our team understands the technical context of every part number we handle — we are not a general electronics broker.
- Verified Supply Chain — Every unit passes through our documented inspection process before shipment. We disclose condition, source, and firmware revision transparently, so your engineering team can make an informed decision.
- 24-Hour Inquiry Response — Industrial downtime does not wait for business hours. We commit to responding to all inquiries within 24 hours, including availability confirmation and preliminary pricing.
- Export-Ready Documentation — We support international B2B buyers with commercial invoices, packing lists, certificates of conformance, and country-of-origin documentation as required by your procurement and customs processes.
- Long-Term Parts Availability — For legacy ControlLogix motion systems that Rockwell has discontinued or placed on limited availability, Konmask.com maintains stock and sourcing relationships to support your installed base for years to come.
Frequently Asked Questions
Q: What is the difference between the Allen-Bradley 1756-M16SE and 1756-M08SE for a SERCOS servo application?
A: The 1756-M16SE supports up to 16 SERCOS axes per module; the 1756-M08SE supports up to 8. Both use the same fiber-optic SERCOS ring interface and are programmed identically in Studio 5000. If your application currently uses 9 or more coordinated servo axes on a single motion coordinator, the M16SE is the correct selection. For ≤8 axes, the M08SE occupies the same chassis slot at lower cost. The two modules are not interchangeable without updating the motion task configuration in your Logix project.
Q: Can the Allen-Bradley 1756-M16SE SERCOS module work with Kinetix 5700 drives on an EtherNet/IP network?
A: No. The 1756-M16SE is a SERCOS (fiber-optic) motion coordinator and is not compatible with EtherNet/IP-based drives such as the Kinetix 5700. The Kinetix 5700 uses the 1756-EN2T or similar EtherNet/IP communication module for motion coordination via CIP Motion. If you are migrating from a SERCOS-based 1756-M16SE system to Kinetix 5700, a full drive replacement and motion re-commissioning project is required — it is not a module swap.
Q: Is it possible to source a used or surplus Allen-Bradley 1756-M16SE with a warranty, and what documentation can be provided?
A: Yes. Konmask.com supplies tested surplus and refurbished 1756-M16SE modules that have passed our functional inspection process, including SERCOS ring loopback testing. We provide a functional test report, pre-shipment inspection photos, and a certificate of conformance. A limited warranty period is offered on tested units — contact us for current terms. Factory-repaired units with Rockwell Automation certification are disclosed separately when available.
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Contact: support@konmask.com | +0086 19859288691
