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Kollmorgen S71201-NA

Product Introduction

Full-digital high-performance single-axis servo amplifier developed by Kollmorgen for medium-power precision motion control. Optimized for synchronous servo motors, linear motors and asynchronous motors, integrated multi-bus communication and SIL3 safety torque off function, standardized DIN rail cabinet mounting design for automated production lines.

Detailed content

Technical Specifications & Core Performance Parameters (Bold Key Data)

  • Input Power Rating: AC 115V / 230V, 50/60Hz Single/Three-Phase
  • Rated Continuous Output Current: 5.0 Arms
  • Peak Output Current: 15.0 Arms (2-second maximum sustain)
  • Nominal Output Power: 2.5kW / 3.3kW / 4.4kW multi-power tier matching
  • DC Bus Operating Range: 160VDC ~ 455VDC; Overvoltage fault threshold 455VDC, Undervoltage fault threshold 100VDC
  • PWM Switching Frequency: 8kHz fixed output stage frequency
  • Control Loop Refresh Cycles:

    Current Loop: 62.5μs, Speed Loop: 62.5μs, Position Loop: 250μs (125μs optional high-speed mode)

  • Supported Feedback Signals: Resolver, EnDat 2.1/2.2, BiSS-C, HIPERFACE, SFD3 single-cable feedback, incremental encoder, SSI absolute encoder
  • Communication Interfaces (Onboard, No Expansion Card Required): EtherCAT, CANopen, DeviceNet, PROFIBUS, SERCOS 2, analog ±10V command, pulse/direction input
  • Safety Certification Grade: SIL3 / PLe (EN 61508, EN 60204-1); Dual-channel STO safety torque shutoff circuit
  • Physical Dimension: W 70mm × H 345mm × D 243mm (excluding external connectors)
  • Net Weight: 4.4kg
  • Protection Class: IP20 (cabinet internal installation only)
  • Operating Ambient Temperature: 0°C ~ +40°C full rated output; 40°C ~ 55°C linear derate 2.5% per °C
  • Storage Temperature Range: -25°C ~ +55°C
  • Allowable Relative Humidity: ≤85%, zero condensation permitted
  • Max Operating Altitude: 1000m without power derating; 6% power reduction per additional 1000m elevation

Material Composition

  1. Outer Housing: Cold-rolled steel plate with black matte anti-corrosion electrophoretic coating
  2. Power Heat Sink: Extruded high-purity aluminum alloy with finned forced air cooling structure
  3. Main Control PCB: FR-4 high-temperature resistant fiberglass substrate, tin-lead free industrial grade solder
  4. Power IGBT Module: Silicon insulated gate bipolar transistor with built-in temperature thermistor
  5. Terminal Connectors: Copper alloy terminals with nickel plating, flame-retardant PA66 plastic insulation housing
  6. Internal Filter Components: Metal film EMC suppression capacitors, ferrite ring magnetic core inductors

Structural Features

  1. Vertical DIN rail mounting structure, standard 35mm cabinet rail compatible
  2. Separate upper signal connector zone and lower high-power terminal zone, physical isolation of strong/weak current circuits
  3. Built-in integrated EMC power filter and regenerative braking resistor module, no external accessory required for basic braking function
  4. Front panel status LED array: Power, Fault, Bus Communication, STO Safety, Axis Running indicator lights
  5. SD card slot on front panel for offline parameter storage, firmware batch upgrade without host computer
  6. Internal layered shielding metal partitions to eliminate cross-interference between power circuit and control circuit

Working Principle

  1. AC mains input passes built-in rectifier to convert alternating current to stable DC bus voltage; IGBT power bridge executes sine-wave vector PWM modulation to output three-phase adjustable frequency/voltage power to servo motor stator windings
  2. Real-time collection of motor rotor position via feedback encoder; triple closed-loop algorithm (current-speed-position) operates in synchronous cycle to dynamically adjust output current amplitude and phase
  3. Onboard 32-bit floating-point DSP processor executes motion control logic, electronic cam, electronic gear, flying shear and positioning program via built-in IEC 61131 macro programming language
  4. Dual-channel STO hardware circuit directly cuts power drive gate signal upon safety trigger, mechanical contactor independent of control software to achieve zero torque output within 2μs
  5. Real-time monitoring of DC bus voltage, output current, heat sink temperature and motor winding temperature; automatic trigger of hardware protection cutoff when parameter exceeds rated threshold

Function Characteristics

  1. Multi-mode control support: Torque mode, velocity mode, absolute/relative position mode, homing positioning, multi-segment motion profile continuous execution
  2. Automatic motor parameter identification: One-click self-tuning of winding inductance, rotor inertia, cogging torque compensation coefficient
  3. Built-in encoder emulation output: A/B/Z quadrature signal for secondary slave axis synchronization without additional signal conversion module
  4. 31-channel expandable digital I/O: 13 digital input, 4 digital output, 1 analog input, 1 analog output for external sensor and actuator linkage
  5. Real-time fault waveform recording: Store 10 groups of pre-failure current/velocity/position data for rapid fault diagnosis
  6. Multi-axis synchronous bus synchronization: EtherCAT bus minimum communication cycle 125μs, support synchronous control of 128 axes on single master station

Advantage Highlights

  1. Ultra-fast triple loop response bandwidth, speed loop maximum bandwidth 600Hz, ultra-low velocity ripple <2% under 10rpm low-speed operation
  2. Integrated all mainstream industrial bus protocols, eliminate additional communication expansion card procurement cost
  3. SIL3 dual-channel STO safety function integrated as standard, meets global machinery safety certification standards without external safety relay
  4. Single-cable SFD3 feedback compatibility, reduce field wiring quantity by 50% and lower electromagnetic interference risk
  5. Onboard EMC filter eliminates external filter module, compact cabinet layout reduces overall equipment volume
  6. SD card offline parameter backup realizes batch equipment consistent configuration, shorten production commissioning cycle by 70%

Applicable Industries

Precision CNC machine tools, semiconductor wafer handling equipment, lithium battery winding & slitting machinery, high-speed printing & labeling equipment, automated packaging production lines, 3C electronic assembly robots, medical precision positioning equipment, textile high-speed warp knitting machinery, laser cutting engraving equipment

Installation Requirements

  1. Mount vertically on standard 35mm DIN rail inside sealed electrical cabinet; maintain 100mm minimum top/bottom ventilation clearance, 20mm left/right clearance between adjacent drives
  2. Cabinet forced cooling fan mandatory when continuous operating temperature exceeds 40°C; airflow direction parallel to drive heat sink fins
  3. Power cable cross-section ≥2.5mm² copper wire for rated 5A output; feedback signal cable must use double-shielded twisted pair dedicated servo cable
  4. Equipment grounding terminal connected to cabinet unified ground bar; grounding resistance ≤4Ω, grounding wire cross-section ≥4mm²
  5. Strong power wiring and weak signal wiring separate wiring trough, minimum 15cm separation distance to avoid electromagnetic coupling interference
  6. Installation environment strictly isolated from metal dust, corrosive gas, oil mist and water vapor; air filter installed at cabinet air intake

Usage Precautions

  1. Power input voltage deviation must be limited within ±10% rated voltage; voltage fluctuation exceeding range triggers permanent overvoltage hardware damage
  2. Disconnect main power supply and wait 10 minutes for DC bus capacitor full discharge before disassembling wiring connectors to prevent electric shock hazard
  3. Forbid direct short-circuit of motor three-phase output terminals when drive powered on; instantaneous short-circuit causes IGBT module breakdown
  4. Do not operate under condensation environment; moisture infiltration leads to PCB short-circuit and insulation breakdown
  5. Avoid installation near vibration sources (stamping machines, vibratory screening equipment); continuous vibration loosens internal solder joints and terminal wiring
  6. Conduct annual full inspection of heat sink dust accumulation; dust blocking cooling fins causes over-temperature protection and drive shutdown
  7. STO safety circuit wiring must adopt independent dual twisted shielded cable, cannot share wiring with other digital signal lines

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