Description
System Architecture & Operational Principle
The S72402-NANANA-NA is a high-performance digital servo drive from the S700 series, designed for precision motion control in industrial automation. In the Purdue Model, it resides at Level 2, acting as a control device that executes motion sequences. It receives commands from upstream systems like a PLC or HMI, typically via EtherCAT or CANopen, specifying target position, velocity, or torque. The drive processes these commands using a high-speed DSP executing Field-Oriented Control (FOC) algorithms. It outputs modulated PWM signals to the servo motor’s stator windings, driving precise adjustments. A real-time feedback loop from the motor’s encoder allows for closed-loop correction, maintaining accuracy. The drive connects to the system via a high-speed serial bus, offering deterministic communication and hot-swap capability for minimal downtime. Its backplane or network interface is designed for high data throughput, essential for multi-axis synchronization. The inherent advantage is the deterministic nature of the fieldbus, which ensures coordinated motion in complex machinery.
Kollmorgen S72402-NANANA-NA
Core Technical Specifications
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Input Voltage: 3-phase 208–480V AC (±10%)
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Output Current: 24 ARMS continuous, 48 ARMS peak (3 sec)
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Control Modes: Position, Speed, Torque
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Communication: EtherCAT, CANopen, RS232, Analog (±10V), Pulse/Direction
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Protection Level: IP20 (dust-protected, indoor use)
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Operating Temperature: -20°C to +60°C (derate above 40°C)
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Dimensions: 220 mm (H) × 155 mm (W) × 60 mm (D)
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Weight: 2.8 kg (6.2 lbs)
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Control Bandwidth: 5 kHz (current loop)
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Encoder Support: Resolver, Incremental, Hiperface DSL, EnDat 2.2
Customer Value & Operational Benefits
The S72402-NANANA-NA provides tangible benefits in demanding automation environments. Its architecture translates to measurable operational improvements.
Reduced Downtime
The drive supports hot-swappable I/O modules and has a self-diagnostic function. When a fault occurs, the integrated SOE (Sequence of Events) recorder captures timestamped data, pinpointing the trigger. This accelerates root-cause analysis, cutting mean-time-to-repair (MTTR).
Energy Efficiency
The high-efficiency power conversion stage (≥95%) and regenerative braking capability reduce energy consumption. In vertical axis applications like hoists, regenerated energy is fed back to the DC bus, lowering utility costs.
Integration Flexibility
Support for multiple protocols (EtherCAT, CANopen, RS232) allows integration with existing PLCs and HMIs. This avoids costly rip-and-replace projects when upgrading a single component in a legacy system.
Kollmorgen S72402-NANANA-NA
Field Engineer’s Notes (From the Trenches)
When installing the S72402-NANANA-NA, verify the 3-phase input voltage with a True-RMS meter. I’ve seen sites use a 200V supply, which blows the DC bus capacitors. Also, route encoder cables away from power lines. Run them in separate conduits or use shielded twisted-pair with 360-degree grounding to prevent EMI-induced position jitter. For vertical axes, enable the brake chopper in software to dissipate regenerative energy; otherwise, you’ll get an overvoltage fault during descent. Firmware updates via WorkBench are mandatory yearly to patch bugs and add motor profiles.
Real-World Applications
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CNC Machine Tool Spindle Control: In a vertical machining center, the drive controls the spindle motor. It receives CAM-generated trajectories from the CNC controller via EtherCAT. The drive’s fast current loop (5 kHz) enables rapid acceleration, reducing cycle time. It maintains constant surface speed by adjusting spindle rpm based on tool position.
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Automated Guided Vehicle (AGV) Steering: An AGV uses two S72402-NANANA-NA drives to control independent steering motors. The vehicle’s navigation controller sends position commands over CANopen. The drives provide precise wheel angle control, allowing the AGV to navigate tight aisles in a warehouse. The IP20 rating is sufficient for indoor use.
