Siemens 6SN1112-1AA00-0AA0 Simodrive PWM Module for Servo Motor Control

Product Overview

The Siemens 6SN1112-1AA00-0AA0 is a PWM (pulse width modulation) power module belonging to the Simodrive 611 series of digital drive systems. This module is designed to supply controlled power to AC servo motors in industrial automation applications such as CNC machine tools, robotics, and high-performance positioning systems. The Simodrive 611 system provides modular drive solutions with a common DC bus, allowing multiple axis modules to share power. The 6SN1112-1AA00-0AA0 is a specific PWM module variant that converts DC link voltage into variable-voltage, variable-frequency AC for motor control.

Key Features of 6SN1112-1AA00-0AA0

The module typically supports a rated output current between 20A and 50A (refer to nameplate). It uses IGBT technology for efficient switching and low losses. The unit includes integrated current sensing and temperature monitoring for protection against overloads. It communicates with the Simodrive 611 control unit (e.g., 6SN1118) via the internal drive bus. LED indicators show ready, fault, and enable status.

The 6SN1112-1AA00-0AA0 is designed for forced-air cooling and must be mounted in a cabinet with adequate ventilation. It operates from a DC link voltage of 600 V DC (nominal). The module has a compact book-size format, allowing side-by-side mounting to save panel space. It includes screw terminals for DC link input and motor output connections. The device is certified for CE and UL. It operates in ambient temperatures of 0 to 40°C (derating above).

Technical Specifications

• Manufacturer: Siemens AG

• Part Numbers: 6SN1112-1AA00-0AA0, 6SN1-112-1AA00-0AA0

• Series: Simodrive 611

• Product Type: PWM Power Module

• Input (DC Link): 600 V DC (nominal, from infeed module)

• Output Current: Refer to nameplate (typically 20-50 A)

• Output Voltage: 0-480 V AC, 3-phase

• Switching Frequency: 8 kHz typical

• Protection: Overcurrent, overvoltage, overtemperature

• Cooling: Forced air (internal fan)

• Communication: Drive bus to control unit

• Indicators: Ready, fault, enable LEDs

• Terminals: Screw type for DC link and motor

• Operating Temperature: 0 to +40 °C (derate to 50°C)

• Degree of Protection: IP20

• Certifications: CE, UL

Functional Description

The module receives PWM gating signals from the Simodrive control unit, which determines the voltage and frequency needed to achieve the commanded motor speed or torque. The IGBTs switch the DC link voltage at high frequency to produce a sinusoidal current in the motor windings. The current feedback loop ensures precise torque control. The module's internal protection circuits monitor temperature and current; if a fault occurs, it signals the control unit and shuts down.

Applications

This Simodrive PWM module is used in CNC milling machines, turning centers, high-speed positioning tables, and industrial robots that require Simodrive 611 series drives. It is a replacement part for failed power modules in existing equipment.