Product Overview

The Siemens 6SN1145-1AA01-0AA1 (6SN11451AA010AA1) is a high-performance UE (Unregulated) Infeed/Regenerative Feedback Module belonging to the robust SIMODRIVE 611 series. Engineered to serve as the power heart of modular drive lineups, this 10/25 kW unit converts incoming 3-phase AC mains into a stabilized DC link voltage for multiple power modules. It is widely utilized in high-precision CNC machining centers and automated production lines where energy recovery is essential; the module is capable of feeding regenerative energy from braking motors back into the power grid. Featuring a built-in mains contactor with a break contact, the 6SN1145-1AA01-0AA1 ensures fail-safe power management and operational stability in demanding industrial environments.

Technical Configuration

The 6SN1145-1AA01-0AA1 is designed for seamless integration within the SIMODRIVE 611 system rack, focusing on thermal flexibility and safety.

• Unregulated DC Link: Provides a cost-effective and reliable DC power source where the DC link voltage is directly proportional to the mains voltage (UE logic).

• Dual Cooling Options: Supports both internal heat dissipation for standard cabinets and external cooling (through-hole mounting) for high-density enclosures where heat must be exhausted outside the cabinet.

• Integrated Mains Contactor: Features a built-in contactor with a break contact (NC) for external monitoring or interlocking with the emergency stop circuit.

• Regenerative Feedback: Unlike standard rectifiers, this module can return energy generated by decelerating motors to the mains, significantly improving energy efficiency and reducing the need for large braking resistors.

• Monitoring Functions: Includes internal circuitry to monitor DC link voltage, mains synchronization, and temperature, providing real-time feedback to the drive's central control unit.

Technical Specifications

Technical FAQs

What is the difference between the "AA01" and "AA02" versions?

The 6SN1145-1AA01-0AA1 is the direct predecessor to the 0AA2. While they share core specifications, the 0AA2 features updated internal components for better noise immunity. They are generally backward compatible in most SIMODRIVE rack configurations.

Does this module require a separate line reactor?

Yes. To ensure compliance with EMC standards and to protect the module from mains transients, a commutating reactor (line reactor) specifically sized for the 10 kW UE module must be installed on the AC input side.

What happens if the internal mains contactor fails to close?

If the contactor does not engage, the DC link will not charge, and the drive system will report a "Mains Fault" or "DC Link Undervoltage." Ensure the 24V supply to the contactor terminals is stable and the enabling signals (Terminals 63/64) are active.

Engineering & Installation Guide

• DC Link Busbar Connection: When installing the 6SN1145-1AA01-0AA1 into a drive group, ensure the DC link busbars are securely tightened with the correct torque. Poor contact on the busbars can cause localized overheating and catastrophic failure of the drive lineup during high-current peaks.

• Thermal Management: If utilizing the external cooling (through-hole) method, ensure the cutout in the cabinet backplane is sealed with the original Siemens gasket to maintain the IP54 rating of the external section. Blocked air filters or restricted airflow will significantly reduce the 25 kW peak power capability.

• Safety Enabling (Terminal 63/64): For the infeed to become operational, the pulse enable (Terminal 63) and drive enable (Terminal 64) must be correctly wired into the machine's safety logic. It is recommended to use shielded cables for these control signals to prevent crosstalk from the high-power AC lines.