H-bridge bipolar constant phase flow drive Bipolar constant current chopper; High-speed optocoupler signal isolation input Electrical input signal is TTL compatible Stationary current is automatically reduced by half Suitable for any small-and-medium automatic equipment with CNC controller, such as X-Y-Z tables, labeling machines, laser cutters, engraving machines, and pick-place devices., Weight: 0.31 Pounds, Manufacturer: HALJIA