Kollmorgen S772-FN3

Kollmorgen S772-FN3

Product Introduction
The S772-FN3 is a high-performance digital servo amplifier in the Kollmorgen SERVOSTAR S700 family, belonging to the S772 size class, which is the highest power class in the S700 series. The “FN” designation indicates the standard European/international configuration with CANopen and EtherCAT onboard, dual-channel STO, and 208–480 V mains voltage. The “3” suffix indicates that the F2 controlled fan option card is factory-installed in Slot 3. This model provides the full S772 feature set with the added benefit of noise-reduced cooling.

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Description

Kollmorgen S772-FN3

Technical Specifications

  • Product Family: SERVOSTAR S700 Series
  • Size Class: S772
  • Device Designation: S772-FN3
  • Product Category: Digital servo amplifier
  • Rated Line Power (S1): 50 kVA
  • Rated Line Voltage: 3×208 V (−10%) to 3×480 V (+10%)
  • Rated DC Bus Voltage: 290–675 VDC
  • Rated Output Current: 72 Arms at 3×208 V / 3×230 V; 72 Arms at 3×400 V; 72 Arms at 3×480 V
  • Peak Output Current: 140 Arms
  • Safety: Dual-channel STO (Safe Torque Off)
  • Onboard Communication: CANopen and EtherCAT
  • Expansion Card: F2 controlled fan option installed in Slot 3
  • Certifications: CE, UL, TÜV

Functional Features

  • Controlled Fan (F2 Option in Slot 3): Fan switches on/off or runs at 50% speed based on heat sink temperature and brake power, reducing average noise emission
  • Fan Switching Thresholds: Fan off below 55°C heat sink / 60°C internal / 20 W brake power; fan at 50% around 58°C / 65°C / 30 W; fan fully on above 65°C / 75°C / 45 W
  • Slot 2 Availability: Slot 2 remains free for other expansion cards such as PosI/O or PosI/O-Monitor
  • Multi-Loop Control: High-speed current, velocity, and position control loops
  • Autotuning: Automatic PID parameter and feedforward adjustment
  • Cogging Suppression: Minimized motor cogging for smooth operation
  • Macro Programming: IEC 61131-3 structured text with 128 KB code memory
  • Multi-Feedback Support: Up to three simultaneous feedback systems
  • Dual-Channel STO: SIL2/PLd compliant safe torque off
  • Dynamic Braking: Integrated braking circuit with standard internal braking resistor
  • MMC Storage Card Slot: Parameter and firmware backup

Application Scenarios

  • Noise-Sensitive Environments: Laboratories, cleanrooms, medical facilities, and office-adjacent production areas
  • Multi-Function Systems: Applications requiring both controlled fan noise reduction and additional expansion cards in Slot 2
  • 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

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, heat dissipation components, and F2 controlled fan option card in Slot 3

Structural Features

  • Form Factor: Compact single-channel servo amplifier
  • Mounting: Panel mounting inside control cabinets
  • Expansion Slots: Slot 1 (empty), Slot 2 (available for user expansion), Slot 3 (F2 controlled fan card installed)
  • 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

Working Principle
The S772-FN3 receives three-phase AC power, rectifies it to a DC bus voltage, and drives the connected servo motor through its IGBT power stage. The drive uses closed-loop feedback control for precise torque, speed, and position regulation. The F2 option card in Slot 3 monitors internal temperature, heat sink temperature, and brake resistor power dissipation to dynamically control the cooling fan speed, optimizing the balance between thermal management and acoustic noise.

Installation Requirements

  • Mount inside a closed switchgear cabinet free from conductive or corrosive materials
  • Use non-painted (conductive) mounting plates for proper EMC grounding
  • Ensure adequate clearance above and below the amplifier for unimpeded ventilation
  • Keep the ambient temperature within the permitted range (0°C to 40°C, up to 45°C with derating)
  • Connect power supply with appropriate fusing
  • Use 60°C or 75°C copper wire only; use Class 1 wire only
  • Use shielded cables for motor and feedback connections
  • Do not mount devices producing strong magnetic fields directly beside the amplifier

Usage Notes

  • The F2 option card is factory-installed in Slot 3 and cannot be added later; verify this configuration at ordering
  • Slot 2 is available for additional expansion cards such as PosI/O or PosI/O-Monitor
  • Monitor the fan operation through the LED display and drive parameters
  • Run the autotuning procedure after mechanical installation
  • If STO is not required, connect STO1-ENABLE and STO2-ENABLE directly to +24 VDC
  • Do not disconnect motor or power cables while the drive is energized
  • Use the MMC storage card to back up parameters before firmware updates
  • Wait 10 minutes after removing power before touching potentially live sections due to residual voltage

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