General Information

• Manufacturer: Siemens AG
• Product Series: SIMODRIVE 611 (Siemens Servo Drive System)
• Product Type: Single-Axis Servo Drive (Analog Control)
• Status: Discontinued (Obsolete, legacy component for older CNC and motion control systems)
• Target Applications: High-precision motion control in machine tools (e.g., lathes, milling machines), robotics, and automated production lines.
• Target Motor Type: Siemens 1PH7/1FT6 series AC servo motors (compatible with permanent magnet synchronous motors and asynchronous servo motors).

Electrical Specifications

1. Input Parameters:
   • Supply Voltage: 380 - 480 V AC, 3-phase, 50/60 Hz (standard industrial 3-phase power input).
   • Input Current: 10 A (rated, at full load).
2. Output Parameters:
   • Output Voltage: 0 - 400 V AC (variable, based on motor speed and load requirements).
   • Rated Output Current: 12 A (continuous duty rating for servo motor operation).
   • Peak Output Current: 36 A (for 1 second, to handle dynamic loads during acceleration/deceleration).
   • Power Rating: Approximately 5.5 kW (maximum output power for connected servo motors).
3. Control Signal Input:
   • Analog Control: ±10 V DC speed reference signal (standard for analog motion control systems).
   • Position Feedback Interface: Compatible with Siemens SIN/COS encoders (1 Vpp differential signal) and Resolver (for motor position and speed feedback).

Control & Functional Features

1. Motion Control Modes:
   • Speed Control Mode: Primary mode for regulating motor speed via analog reference signal, with proportional-integral-derivative (PID) regulation for stable speed accuracy (speed deviation ≤ 0.1% of rated speed).
   • Torque Control Mode: Optional mode for controlling motor torque (via external current reference signal), suitable for applications requiring precise force control.
   • Position Control Mode: Requires external position controller (e.g., CNC system or PLC) to generate position commands, with the drive executing dynamic motion.
2. Protection Functions:
   • Overcurrent Protection: Triggers when output current exceeds peak rating, shutting down the drive to protect internal components and the motor.
   • Overvoltage Protection: Activates if DC link voltage exceeds 700 V DC (due to regenerative braking or grid surges).
   • Undervoltage Protection: Deactivates the drive if input AC voltage drops below 320 V AC, avoiding unstable operation.
   • Over-temperature Protection: Integrated thermal sensor shuts down the drive if internal temperature exceeds 85°C, preventing overheating.
   • Motor Stall Protection: Detects motor overload during standstill and interrupts output to prevent motor damage.
3. Dynamic Performance:
   • Current Control Loop Bandwidth: 1 kHz (ensures fast response to load changes).
   • Speed Control Loop Bandwidth: 100 Hz (supports high-dynamic motion with rapid acceleration/deceleration).

Physical & Environmental Specifications

• Dimensions: Approx. 150 mm (Width) × 300 mm (Height) × 250 mm (Depth) (optimized for cabinet mounting in industrial control panels).
• Weight: Approximately 6 kg.
• Mounting: DIN rail or panel mounting (compliant with EN 50022 standard for industrial control cabinets).
• Protection Class: IP20 (dust-protected, suitable for indoor industrial environments with proper enclosure).
• Cooling Method: Forced air cooling (via internal fan, with airflow direction from front to rear).
• Operating Temperature Range: 0°C to +40°C (continuous operation; derating by 5% per °C above 40°C up to 50°C).
• Storage Temperature Range: -20°C to +70°C.
• Relative Humidity: 5% - 95% (non-condensing).

Application & Compatibility Notes

• System Integration: Designed for use with legacy Siemens CNC systems (e.g., SINUMERIK 810D/840D) and SIMATIC S5/S7 PLCs for motion control. Requires connection to a SIMODRIVE 611 Power Module (e.g., 6SC6100 series) for DC link power supply.
• Replacement Options: As an obsolete product, it is replaced by Siemens’ modern SINAMICS S120 servo drive series (e.g., 6SL3210 series). The SINAMICS S120 offers digital communication (PROFINET/PROFIBUS), higher energy efficiency, and advanced diagnostics.
• Wiring Requirements: Input wiring requires 3-phase AC cables (minimum 4 mm² copper) with 16 A fuses; output wiring to the motor requires 4 mm² copper cables (rated for 12 A continuous current).

Availability