The ESCON 50/5 compact 4-quadrant PWM servo controller offers efficient control of permanent-magnet activated brushed DC motors and brushless EC motors up to approximately 250 Watts. It offers a fast digital current controller with the bandwidth for optimal motor current/torque control. The drift-free yet dynamic speed behavior enables a speed range of 0 to 150,000 rpm. It provides a wide range of functions with fully configurable digital and analog inputs and outputs and can be run in various operating modes (speed controller (closed loop), speed controller (open loop), current controller). It is matched to maxon's range of motors and thus allows dynamic drive solutions that meet the highest demands. Its wide range for input voltage and operating temperature allows a flexible use in almost all drive applications, automation technology, machine manufacturing, equipment engineering, and in mechatronics.