Schneider ATV340U55N4 Low Voltage AC Machine Drive, ATV340. Altivar Machine ATV340 - IoT-ready variable speed drives for safety and heavy duty applications from 0.75 to 75kW (1 to 100Hp). Altivar Machine ATV340 is a Variable Speed Drive designed for OEMs with open loop and close loop control. It supports all motors (IE2,IE3,IE4 synchronous and asynchronous, reluctance) with the heavy duty feature generating 173 Amps continuously in any environment. The integration with Modbus, Ethernet and SERCOS protocols allows remote monitoring availability through Smart Manufacturing, safety options (SS1,SLS,SMS,GDL,SBC) can proactively provide human and industrial process protections.