In many applications it is a requirement that the Dart product being used be interfaced with a supervisory control - plc/micro-controller/computer/HMI. Most applications involve a traditional analog signal sent to the control to set motor speed, and turn the control on or off. More and more we are seeing the need for serial interface over a network-Dart has responded with our Modbus serial interface for the 150 Series. The following details follower/interface options Dart offers and which controls they may be used with in the Analog SCR Drive group.