These flexible frequency inverters offer four modes of operation: V/Hz (either constant or variable), enhanced V/Hz (either constant or variable), vector speed control, and vector torque control. They also feature dynamic torque response, auto-tuning (motor calibration), and low-speed operation. To assist in preventive maintenance programs, inverters also offer the feature of elapsed run time and elapsed power-on time. The electronic programming module (epm) lets you easily setup and program the inverter in one of three ways: using the intuitive integrated keypad, in Windows with the included techlink software, or with the portable remote epm programmer. Plus, your parameter settings are automatically archived, saving you time and improving your efficiency. Select from two enclosure types depending on your application environment. Use the NEMA 1 (IP21) enclosure for indoor use; it provides a basic level of protection to Personnel on the outside and foreign solid ingress to the equipment inside. Use the NEMA 4x (IP65) enclosure for either outdoor or indoor use; it provides a basic level of protection and also a degree of protection against ingress of water (rain, sleet, snow, splashing water, and hosedirected water). note: for options such as an installed communication module (can open, devices, or rs-485/Modbus) or an input EMC filter, please call our application specialists. What's included: techlink software. Use with three-phase motors to create a variable-speed system ideal for the food/pH a RMA processing, packaging, material handling, and HVAC systems choice of three voltages accommodates most international users.