Used condition. Unit was working fine until the 2nd axis stopped functioning. Replaced with a newer unit. Unit is sold as is.

National Instruments’ MID-7604/7602 power drive is a complete power amplifier and system interface for use with four or two axes of simultaneous stepper motion control. Ideally suited to industrial and laboratory applications, the MID-7604/7602 has everything you need to connect motors, encoders, limit switches, I/O, and other motion hardware to National Instruments’ motion controllers.