Kollmorgen S7120P-NA

Kollmorgen S7120P-NA

Product Introduction
The S7120P-NA is a digital servo amplifier in the Kollmorgen SERVOSTAR S700 family, belonging to the S7120P size class. The “NA” suffix indicates the standard North American configuration with CANopen and EtherCAT onboard, single-channel STO, and 208–480 V mains voltage. The “P” designation indicates a premium configuration with enhanced features. This model provides higher power capability than the standard S712 class for very heavy-duty servo applications.

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Description

Kollmorgen S7120P-NA

Technical Specifications

  • Product Family: SERVOSTAR S700 Series
  • Size Class: S7120P
  • Device Designation: S7120P-NA
  • Product Category: Digital servo amplifier
  • Rated Line Power (S1): 9 kVA
  • Rated Line Voltage: 3×208 V (−10%) to 3×480 V (+10%)
  • Rated DC Bus Voltage: 290–675 VDC
  • Rated Output Current: 12 Arms at 3×208 V / 3×230 V; 12 Arms at 3×400 V; 12 Arms at 3×480 V
  • Peak Output Current: 24 Arms
  • Safety: Single-channel STO (Safe Torque Off)
  • Onboard Communication: CANopen and EtherCAT
  • Expansion Cards: None factory-installed (all slots available)
  • Certifications: UL listed, CE, TÜV

Functional Features

  • 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
  • Onboard Fieldbus: CANopen and EtherCAT
  • Single-Channel STO: SIL2/PLd compliant safe torque off
  • Dynamic Braking: Integrated braking circuit with standard internal braking resistor; external brake resistor supported
  • MMC Storage Card Slot: Parameter and firmware backup
  • LED Status Display: Embedded front-panel LED display
  • Configurable I/O: Digital and analog inputs/outputs

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: All slots 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

Working Principle
The S7120P-NA 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 uses closed-loop feedback control for precise torque, speed, and position regulation. The onboard CANopen and EtherCAT interfaces enable real-time communication with the host controller. The drive also supports common DC bus link connections to distribute regenerative power between amplifiers.

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

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