Kollmorgen S703-FN2

Kollmorgen S703-FN2

Product Introduction
The S703-FN2 is a digital servo amplifier in the Kollmorgen SERVOSTAR S700 family, belonging to the S703 size class. The “FN” designation indicates the standard European/international configuration with CANopen and EtherCAT onboard, dual-channel STO, and 208–480 V mains voltage. The “2” suffix indicates that the F2 controlled fan option card is factory-installed in Slot 2. The F2 option reduces noise emission by switching the cooling fan on and off or running it at 50% speed depending on temperature and brake power conditions.

Request Quote
Category:

Description

Kollmorgen S703-FN2

Technical Specifications

  • Product Family: SERVOSTAR S700 Series
  • Size Class: S703
  • Device Designation: S703-FN2
  • Product Category: Digital Servo Amplifier
  • Rated Line Power (S1): 2.2 kVA
  • Rated Line Voltage: 3×208 V (−10%) to 3×480 V (+10%)
  • Rated DC Bus Voltage: 290–675 VDC
  • Rated Output Current: 5 Arms at 3×208 V / 3×230 V; 4 Arms at 3×400 V; 3 Arms at 3×480 V
  • Peak Output Current: 9 Arms
  • Safety: Dual-channel STO (Safe Torque Off)
  • Onboard Communication: CANopen and EtherCAT
  • Expansion Card: F2 controlled fan option installed in Slot 2
  • Certifications: UL listed (file E217428), CE, TÜV

Functional Features

  • Controlled Fan (F2 Option): 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
  • 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
  • Medium-Duty Automation: Conveyor systems, assembly lines, and material handling
  • Machine Tools: Feed axes and tool changers requiring quiet operation
  • Packaging Machinery: High-speed filling, labeling, and wrapping systems
  • Industrial Robotics: Medium-duty robotic arms and gantry systems

Performance Parameters

  • Drive Type: Digital servo amplifier with IGBT power stage
  • Control Modes: Torque, speed, and position control
  • 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

Structural Features

  • Form Factor: Compact single-channel servo amplifier
  • Mounting: Panel mounting inside control cabinets
  • Expansion Slots: Slot 1 (empty), Slot 2 (F2 controlled fan card installed), Slot 3 available
  • 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 S703-FN2 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 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 (Class RK5, CC, J, or T; max 10 A time-delay fuse)
  • Use 60°C or 75°C copper wire only; use Class 1 wire only
  • Tightening torque for field wiring terminals X0, X8, X9: 0.7–0.8 Nm (6.20–7.08 lbf·in)
  • Use shielded cables for motor and feedback connections
  • Do not mount devices producing strong magnetic fields directly beside the amplifier

Related products