A discrete drive option for the Automation 3200 motion system, the Ndrive MP digital servo amplifier from Aerotech Inc. drives brushless, DC brush-type servomotors and stepper motors. Measuring 41 × 141 × 107 mm, the device samples the digital current and servo loop at a rate of 20 kHz and handles both digital and analog I/O and encoder multiplication. It has an output current of up to 10 A peak at 80 VDC, and 5 A continuous. Options for the CE-compliant drive include brake relay and separate logic supply inputs for “keep-alive” operation during an E-Stop condition. Any combination of the amplifiers can be used on the FireWire network, according to the company.