Allen-Bradley 1756-M02AE 2-Axis Analog Encoder Servo Control – ControlLogix Motion Module
When a servo axis loses its command interface in the middle of a production run — a winding line overshoots, a press ram drifts, a packaging cam loses phase — the consequences are not just downtime. They are scrap, tooling damage, and in some cases, personnel risk. The 1756-M02AE exists precisely to prevent that scenario: it is the dedicated analog-output, encoder-feedback motion interface that keeps ControlLogix talking to your drives with deterministic, scan-cycle-synchronized precision.
Within the ControlLogix 1756 platform, the M02AE occupies a specific and non-interchangeable role. Unlike the SERCOS-based 1756-M08SE or the digital-drive 1756-M16SE, the M02AE targets legacy and current analog-input servo drives — the installed base of Kinetix 2000, Ultra 3000, and third-party drives that accept ±10 V command signals. It supports two fully independent axes, each with its own encoder feedback channel, making it the correct module when you need closed-loop analog motion without migrating your entire drive infrastructure.
Technical Specifications
Electrical
- Number of Axes: 2 (independent, simultaneous)
- Command Output: ±10 V DC analog velocity/torque reference
- Encoder Input: Differential quadrature (A, B, Z channels), 5 V DC
- Maximum Encoder Input Frequency: 1 MHz
- Backplane Current Draw: 1.0 A @ 5 V DC (from 1756 chassis backplane)
- Power Dissipation: 5 W (typical)
Mechanical
- Form Factor: Single-slot ControlLogix 1756 chassis module
- Connector: 40-pin RTB (Removable Terminal Block), not included
- Dimensions: Standard 1756 module profile
- Weight: Approx. 200 g
Environmental
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: -40 °C to +85 °C
- Relative Humidity: 5–95% non-condensing
- Vibration: IEC 68-2-6 compliant
- Shock: IEC 68-2-27 compliant
Certifications & Standards
- UL Listed, CE Marked (EMC Directive)
- ATEX / Class I Div 2 (verify with specific firmware revision)
- Conforms to IEC 61131-2 programmable controller hardware standard
Key Features & Benefits
- Dual-axis simultaneous control — Both axes execute motion commands within the same ControlLogix scan cycle, eliminating inter-axis timing skew that causes synchronization faults in gantry and cross-coupled systems.
- ±10 V analog command output — Compatible with the widest range of installed servo drives globally; no drive firmware upgrade required when replacing a failed motion module.
- 1 MHz quadrature encoder input — Supports high-resolution encoders up to 2,500 PPR at 6,000 RPM without pulse loss, maintaining position accuracy to ±1 encoder count.
- Integrated axis fault diagnostics — Drive fault, encoder loss, and following-error faults are surfaced directly in RSLogix 5000 / Studio 5000 tag structure, reducing fault-to-fix time by eliminating external diagnostic tools.
- Hot-swap capable in redundant chassis configurations — Module can be replaced under power in a 1756 chassis equipped with a redundancy module, supporting IEC 61511 SIL-rated partial-stroke maintenance windows.
- Firmware-managed axis tuning storage — PID gains, velocity feedforward, and acceleration feedforward are stored in the controller project, not the module, so a module swap does not require re-tuning.
Industry & Equipment Applications
- Automotive Body & Stamping: Transfer press servo feeds, blanking line coil straighteners, and hemming robot axis control where analog drive infrastructure is retained during partial line upgrades.
- Packaging & Converting: Rotary knife registration, film tension control, and multi-axis pouch-forming machines requiring phase-locked analog servo coordination.
- Metals & Wire Processing: Wire drawing capstan speed control, coiler traverse positioning, and cold-rolling mill screw-down axis regulation with encoder feedback from resolver-to-encoder converters.
- Printing & Paper: Web tension master/follower configurations, impression cylinder positioning, and register mark correction loops on offset and flexographic presses.
- Material Handling & Cranes: Hoist speed regulation, trolley positioning on overhead bridge cranes, and anti-sway control systems using analog-input variable-speed drives.
- Oil & Gas / Utilities: Valve actuator positioning on pipeline compressor stations and pump speed trim control where intrinsically safe analog signals are mandated by area classification.
System Integration & Compatible Parts
Upstream (Controller & Chassis):
- 1756-L6x / 1756-L7x / 1756-L8x ControlLogix CPUs (requires RSLogix 5000 v16+ or Studio 5000 v21+)
- 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 chassis
- 1756-PA72 / 1756-PB72 power supplies
Downstream (Drives & Feedback):
- Kinetix 2000 (2093-xxxx) — native analog command interface
- Ultra 3000 (2098-DSD-xxx) — analog velocity mode
- Third-party analog-input drives: Yaskawa Sigma-5/7 (analog mode), Mitsubishi MR-J4 (analog mode), Siemens S120 (analog setpoint)
- Encoder feedback: any differential quadrature encoder, 5 V line-driver output
Equivalent / Replacement Considerations:
- 1756-M02AE is not directly interchangeable with 1756-M03SE or 1756-M08SE (SERCOS interface — different wiring and drive firmware required)
- For new designs, Rockwell recommends evaluating 1756-M1 (EtherNet/IP Kinetix 5700 integration), but this requires drive replacement — the M02AE remains the correct choice for analog drive retention
Our Quality Assurance Process
- Visual & Physical Inspection: Module housing, connector pins, label integrity, and firmware revision label verified against Rockwell Automation factory markings. Counterfeit screening per IDEA-STD-1010B.
- Functional Power-On Test: Module seated in a live 1756 chassis; backplane communication, I/O tree enumeration, and axis configuration download verified in Studio 5000.
- Analog Output Calibration Check: ±10 V command output measured at RTB terminals across the full command range using calibrated instrumentation (NIST-traceable).
- Encoder Input Verification: Simulated quadrature pulse train injected at rated frequency; position accumulator accuracy confirmed in controller tag monitor.
Available Documentation: Test report, firmware revision record, photos of physical condition, Rockwell Automation datasheet reference, and certificate of conformance upon request.
How to Order
- Submit Your Inquiry: Email support@konmask.com or use the contact form with your required quantity, required delivery date, and any specific firmware revision requirements.
- Receive Quotation: Our team will respond within 24 hours with pricing, lead time, and stock availability confirmation.
- Confirm & Ship: Upon PO or payment confirmation, modules are inspected, packed in anti-static ESD packaging, and dispatched with full tracking.
Why Choose Konmask.com?
- Specialist inventory: We stock ControlLogix motion modules specifically — not a general distributor carrying thousands of unrelated SKUs.
- Verified sourcing: Every module is sourced from traceable channels and physically inspected before listing; we do not list modules we cannot physically verify.
- Technical pre-sales support: Our team can confirm compatibility with your specific chassis, CPU firmware, and drive model before you commit to a purchase.
- Global export experience: We ship to 40+ countries with export documentation, commercial invoices, and packing lists formatted for customs clearance.
- Responsive communication: 24-hour inquiry response, 7 days a week — because production downtime does not respect business hours.
Frequently Asked Questions
Q: Can the 1756-M02AE control servo axes without a ControlLogix CPU — for example, in a standalone motion application?
A: No. The 1756-M02AE is a backplane-dependent module; it requires a ControlLogix 1756-Lxx CPU in the same or connected chassis to execute motion instructions. It cannot operate as a standalone motion controller.
Q: What is the difference between the 1756-M02AE and the 1756-M02AS, and which one do I need for my analog servo drive?
A: The 1756-M02AE uses incremental quadrature encoder feedback; the 1756-M02AS uses analog (sine/cosine) encoder feedback for higher-resolution absolute-position applications. If your drive and encoder use standard differential quadrature (A/B/Z) signals, the M02AE is the correct selection.
Q: Is the 1756-M02AE compatible with Studio 5000 Logix Designer, and what minimum firmware version is required for full motion axis configuration?
A: Yes. The 1756-M02AE is supported in RSLogix 5000 v16 and later, and in Studio 5000 Logix Designer v21 and later. For full Integrated Motion on EtherNet/IP axis object compatibility, verify your CPU firmware is at v20 or above; earlier firmware supports the module but with legacy motion instruction sets only.
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