Kollmorgen S70362-NANANA AC Servo Drive – AKD Series

Kollmorgen S70362-NANANA: Precision AC Servo Amplifier for Deterministic Multi-Axis Motion Control

The Kollmorgen S70362-NANANA is a panel-mount AC servo drive belonging to the AKD platform — a field-proven servo amplifier architecture deployed across CNC machine tools, industrial robotics, semiconductor handling, and high-speed packaging lines. Rated at 3 A continuous / 6 A peak output current with a 120–240 VAC single- or three-phase supply input, this unit occupies the low-to-mid power segment of the AKD family while sharing the identical DSP core, firmware stack, and fieldbus interface set as higher-current variants. The result is a drive that delivers enterprise-grade motion performance in a compact, DIN-rail-compatible enclosure without compromising on control bandwidth or diagnostic depth.

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Technical Parameters

Hardware Logical Analysis

The S70362-NANANA is built around a fixed-point DSP executing the current regulation loop at a 16 kHz interrupt rate. At this switching frequency, the IGBT gate drive signals are updated every 62.5 µs, which is fast enough to suppress torque ripple components below the mechanical resonance frequency of most servo motor–load combinations. The current feedback path uses two-phase Hall-effect current sensors with a measurement bandwidth exceeding 10 kHz, ensuring that the proportional-integral (PI) current regulator receives low-latency, low-noise feedback even under transient load conditions.

The DC bus architecture is a shared-rail design: the rectified AC input charges a bank of electrolytic capacitors that supply the IGBT inverter stage. During motor deceleration, regenerative energy flows back into this bus. The S70362-NANANA includes an internal braking chopper transistor that activates when bus voltage exceeds a programmable threshold (typically 390 VDC for a 240 VAC supply), dissipating excess energy through an internal resistor. For high-inertia loads with frequent deceleration cycles, the chopper output can be connected to an external braking resistor to increase thermal capacity without modifying the drive’s power stage.

EMC compliance is achieved through a multi-layer strategy. The power stage PCB uses a ground plane with controlled impedance traces to minimize radiated emissions from the PWM switching node. An integrated EMC filter on the AC input attenuates conducted emissions to meet EN 61800-3 Category C2 limits. The feedback and fieldbus signal cables are routed through shielded connectors with 360° shield termination at the drive chassis, preventing common-mode noise injection into the encoder signal chain — a critical design requirement in environments with variable-frequency drives or welding equipment operating nearby.

The STO safety channel is implemented as a dual-channel hardware interlock that disables the IGBT gate drive signals independently of the DSP firmware. This architecture ensures that a firmware fault cannot inadvertently re-enable the power stage, satisfying the architectural requirements of IEC 62061 SIL 2 and ISO 13849-1 PLd Category 3. The STO response time is less than 10 ms from input signal de-energization to confirmed gate disable, verified by the drive’s internal diagnostic logic and reported via the EtherCAT status word.

System Integration Benefits

• EtherCAT Synchronization at 250 µs Cycle Time: The AKD’s EtherCAT slave controller supports Distributed Clocks (DC) synchronization, aligning all axes on a multi-drive network to within ±1 µs of the master clock. This eliminates inter-axis phase jitter in coordinated gantry, cross-cutting, and electronic gearing applications.
• Plug-and-Play Feedback with SFD3: Kollmorgen’s Smart Feedback Device (SFD3) protocol transfers motor nameplate data, encoder resolution, and thermal sensor readings over a single cable at power-up. The drive auto-configures current limits, commutation offset, and feedback scaling without manual parameter entry, reducing commissioning errors to near zero.
• Integrated Motion Tasking (128 Tasks): Up to 128 motion profiles can be stored in non-volatile EEPROM and triggered via digital I/O without host controller involvement. This enables standalone operation for simple indexing, homing, and jogging sequences, reducing PLC scan-cycle load in distributed machine architectures.
• Bode Plot and Oscilloscope via WorkBench: The included PC software provides a real-time frequency response analyzer that injects swept-sine excitation into the velocity loop and plots the resulting Bode diagram. Engineers can identify mechanical resonances, apply notch filters at precise frequencies, and verify stability margins — all without external instrumentation.
• Comprehensive Fault Diagnostics: The drive maintains a 32-entry fault history log with timestamp, fault code, and axis state at the moment of fault. Each fault code maps to a specific hardware or software condition (overcurrent, overvoltage, encoder loss, STO activation), enabling root-cause analysis without oscilloscope capture.
• Thermal Derating Management: An NTC thermistor mounted on the IGBT heatsink feeds a thermal model that calculates junction temperature in real time. The drive reduces PWM frequency and current limit progressively as temperature rises, preventing abrupt shutdown during sustained high-duty-cycle cycles in poorly ventilated cabinets.
• Multi-Feedback Flexibility on a Single Hardware SKU: The S70362-NANANA supports SFD3, EnDat 2.2, Hiperface, resolver, and incremental encoder feedback from the same X10 connector without hardware modification. This allows a single drive SKU to be deployed across multiple motor families in a plant, simplifying spare-parts inventory management.
• Safe Torque Off Without External Contactors: The integrated SIL 2 STO function eliminates the need for a motor-side safety contactor in most machine safety architectures. Removing the contactor reduces cabinet wiring complexity, eliminates contactor wear as a maintenance item, and decreases the response time of the safety function by removing the contactor’s mechanical switching delay.

Quality Assurance & Global Logistics

Every Kollmorgen S70362-NANANA unit supplied through siemensplc.com is sourced through verified distribution channels with full OEM traceability. The manufacturer label, date code, and serial number remain intact and unmodified. Each unit undergoes a pre-dispatch functional verification that includes DC bus charge-up, STO channel continuity check, and EtherCAT communication handshake. Units that do not pass all verification steps are quarantined and not dispatched.

Packaging follows anti-static handling protocols: the drive is sealed in a conductive ESD bag, placed in a foam-lined inner carton, and packed in a double-wall corrugated outer box rated for air freight handling. This packaging configuration has been validated for DHL Express, FedEx International Priority, and UPS Worldwide Express services — all of which are available from our Xiamen, China dispatch hub.

Transit times from Xiamen to major industrial hubs: Europe (Frankfurt, Rotterdam) 3–5 business days; North America (Los Angeles, Chicago) 4–6 business days; Southeast Asia (Singapore, Bangkok) 1–2 business days; Middle East (Dubai) 3–4 business days. All shipments include full tracking, commercial invoice, and packing list. Export documentation for customs clearance is prepared in compliance with HS Code 8537.10 classification requirements.

A 12-month warranty covers manufacturing defects in materials and workmanship from the date of dispatch. Warranty claims are acknowledged within 24 hours of a confirmed fault report. RMA authorization is issued within 48 hours, and replacement units are dispatched within 3 business days of receiving the defective unit at our Xiamen facility.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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