MICRODRIVES FOR CONTINUOUS OR START/STOP APPLICATIONS

Dart Controls introduces new MicroDrives – microprocessor-based closed loop DC SCR drives with integrated, programmable digital display. Suitable for DC motors rated to 2hp, MicroDrives are available for continuous operation (MD series), or for start/stop or applications requiring rapid drive response time (MD Plus series). Both series feature programmable display with drive speed information displayed in meaningful engineering units (GPM, FPM, MM:SS, % of Master, etc.). Each series is available as panel mount or NEMA4 Surface Mount stand-alone enclosed version. Either series may be configured in three modes – Rate, Time, and Follower. Follower mode allows for two or more motors to operate at speeds in proportion to each other – a common need in blending, batch, and synchronized material feed and handling applications. The logic controller functionality built into the MicroDrives may eliminate the need for a PLC and its custom programming. For continuous operation environments, the MD Series features an on-board microprocessor with non-volatile memory coupled with sophisticated internal software for accuracy and control. User-friendly front-panel programming allows users to customize the MD for specific applications. It can be set to display the target speed directly in RPM, FPM, GPM, process time, or any other engineering unit. Programmable parameters include maximum and minimum set speed, alarm output, operating mode (master or follower), and input configuration. For start/stop environments, the MD Plus series offers all of the benefits of the MD series with the addition of a velocity form PID control algorithm; an isolated 4mA to 20mA process signal follower, and industrial serial communication – for easy integration into existing process control systems. The MD Plus series is for start/stop environments or applications which require rapid drive response times such as metering pumps, proportionate product mixing, filling stations, and others.