Description
Kollmorgen S72401-NAS
Technical Specifications
- Product Family: SERVOSTAR S700 Series
- Size Class: S724
- Device Designation: S72401-NAS
- Product Category: Digital servo amplifier
- Rated Line Power (S1): 18 kVA
- Rated Line Voltage: 3×208 V (−10%) to 3×480 V (+10%)
- Rated DC Bus Voltage: 290–675 VDC
- Rated Output Current: 24 Arms at 3×208 V / 3×230 V; 24 Arms at 3×400 V; 24 Arms at 3×480 V
- Peak Output Current: 48 Arms
- Safety: Dual-channel STO (Safe Torque Off)
- Onboard Communication: CANopen and EtherCAT
- Expansion Cards: None factory-installed (all slots available)
- Certifications: CE, UL, TÜV
Functional Features
- Multi-Loop Control: High-speed current, velocity, and position control loops for rapid response and precise motion
- Autotuning: Intelligent autotuning that automatically adjusts PID parameters and feedforward settings based on a brief test movement
- Cogging Suppression: Built-in algorithms to minimize motor cogging effects for ultra-smooth operation
- Macro Programming: Integrated IEC 61131-3 structured text programming environment with 128 KB code memory
- Multi-Feedback Support: Reads and evaluates up to three feedback systems simultaneously, including resolvers, SinCos encoders (BiSS, EnDat 2.1/2.2, HIPERFACE), Hall sensors, and incremental encoders
- Onboard Fieldbus: CANopen and EtherCAT for seamless network integration
- Dual-Channel STO: SIL2/PLd compliant safe torque off with dual-channel monitoring
- Dynamic Braking: Integrated braking circuit with standard internal braking resistor
- MMC Storage Card Slot: For backup and replication of parameters and firmware
- LED Status Display: Embedded front-panel LED display for status and fault indication
- Configurable I/O: Digital and analog inputs/outputs for limit switches, emergency stops, and auxiliary control signals
Application Scenarios
- Very Heavy-Duty Automation: Large-scale conveyor systems, heavy material handling, and high-throughput assembly lines
- Machine Tools: High-power feed axes, spindle drives, and multi-axis CNC systems
- Industrial Robotics: Heavy-duty robotic arms, gantry systems, and palletizing robots
- Metal Forming: Press feeds, shearing machines, and bending equipment
- Woodworking and Plastics: Router drives, extruder feeds, and injection molding actuators
- Textile and Printing: Web tensioning, registration, and cutting systems
Performance Parameters
- Drive Type: Digital servo amplifier with IGBT power stage
- Control Modes: Torque, speed, and position control
- Switching Frequency: High-frequency PWM for low acoustic noise
- Protection Features: Overcurrent, overvoltage, undervoltage, overtemperature, phase loss, short circuit, and soft start
- Motor Overload Protection: Solid-state protection at 130% of full load current
- Short Circuit Rating: Suitable for circuits delivering not more than 42 kA rms symmetrical amperes at max 480 VAC
Material Composition
- Durable metal enclosure housing integrated power electronics (IGBT module with floating current measurement), control circuitry, EMC filter, and heat dissipation components
Structural Features
- Form Factor: Compact single-channel servo amplifier
- Mounting: Panel mounting inside control cabinets
- Expansion Slots: Slot 1, Slot 2, and Slot 3 all available for optional expansion cards
- Connectors: Power input/output terminals, motor connection terminals, feedback connector, STO inputs, and fieldbus interface
- Shield Connections: All shield connections made directly to the amplifier for EMC compliance
Working Principle
The S72401-NAS receives three-phase AC power from the mains, rectifies it to a DC bus voltage, and drives the connected servo motor through its IGBT power stage using high-frequency PWM. The drive continuously reads feedback from the motor’s encoder or resolver and executes closed-loop current, velocity, and position control algorithms. The onboard CANopen and EtherCAT interfaces enable real-time communication with the host controller for coordinated multi-axis motion.
