Siemens 6SN1123-1AB00-0AA2 Simodrive 611 Dual Axis LT Power Module

Product Overview

The Siemens 6SN1123-1AB00-0AA2 is a Simodrive 611 LT (Line) power module that provides two independent axes of servo motor control. Each axis is rated at 15 A continuous output current, making this module suitable for driving two smaller servo motors or one axis with a higher peak requirement. It is part of the modular Simodrive 611 drive system used in CNC machine tools, robotics, and general automation. The LT designation indicates it is designed for use with the Simodrive 611's common DC link bus.

Key Features of 6SN1123-1AB00-0AA2

The module integrates two IGBT inverters sharing a common DC link input. It includes separate current sensing and thermal protection for each axis. The module communicates with the Simodrive 611 control unit (e.g., 6SN1118) via a dedicated bus, receiving PWM signals and returning status. LED indicators show ready, fault, and axis enable. The unit is forced-air cooled and must be mounted with a specified clearance. It has screw terminals for DC link, motor outputs, and a 26-pin connector for encoder feedback and I/O.

Each axis supports motor current up to 15 A continuous (30 A peak for 3 seconds). The output voltage is up to 3x480 V AC from a 600 V DC link. The module has a compact book-size format requiring one slot width in the 611 rack. It operates from 0 to 40°C ambient (derating above). Safety features include short-circuit protection, ground fault detection, and over-temperature shutdown. The module is CE and UL certified.

Technical Specifications

• Manufacturer: Siemens AG

• Part Number: 6SN1123-1AB00-0AA2

• Series: Simodrive 611 LT

• Product Type: Dual Axis Power Module

• Number of Axes: 2

• Rated Output Current: 15 A per axis (continuous)

• Peak Output Current: 30 A per axis (for 3 seconds)

• Input (DC Link): 600 V DC

• Output Voltage: 0-480 V AC, 3-phase

• Cooling: Forced air (internal fan)

• Protection: Overcurrent, overtemperature, short circuit

• Indicators: Ready, fault, axis 1/2 enable LEDs

• Terminals: Screw for DC link and motor

• Operating Temperature: 0 to +40 °C

• Degree of Protection: IP20

• Dimensions (W x H x D): 100 mm x 360 mm x 270 mm (approx.)

• Certifications: CE, UL

Functional Description

The module receives PWM signals from the control unit for each axis independently. It converts the DC link voltage into a variable-frequency AC output to drive two servo motors. Current feedback loops regulate the torque, and the module reports actual current to the control unit. If one axis faults (e.g., overcurrent), only that axis is disabled while the other can continue if the system allows. The fan runs continuously when the DC link is energized.

Applications

This dual-axis module is used in machine tools with two auxiliary axes (e.g., tool changer and coolant pump) or in small robotics where two axes share a common drive rack. It is a replacement part for Simodrive 611 systems.