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MID-7604/7602 Stepper Power Motor Drive User Guide
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Introduction
The 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.
The MID-7604/7602 can drive a broad range of stepper motors with its rugged microstepping bipolar
chopper driver and user-selectable current-per-phase settings. In all configurations, power supplies are
built-in and use standard 230/115 VAC for operation. Electronics are fan-cooled to assure reliable
operation.
The MID-7604/7602 simplifies field wiring through separate encoder, limit switch, and motor power
removable screw terminal connector blocks for each axis. The terminal blocks do not require special
wiring tools for installation. The MID-7604/7602 connects to National Instruments motion controllers
using a 68-pin, high-density interconnect cable.
The MID-7604/7602 has four levels of amplifier inhibit/disable protection for motion system shutdown.
The front panel contains both enable and power switches for direct motor inhibiting and system
power-down operations. The MID-7604/7602 also has a host bus power interlock that activates an
internal driver inhibit signal if the host computer is shut down or the motion controller interface cable is
disconnected. The inhibit input from the back panel connectors also inhibits the stepper drives when
activated.
The MID-7604/7602 is packaged in a rugged, lightweight enclosure that can be used as a benchtop unit,
panel mounted using a panel-mount kit, or rack mounted using a 19-inch standard rack kit.
What You Need to Get Started
To set up and use your MID-7604/7602 accessory, you must have the following items:
❑
MID-7604/7602 power drive
❑
Power cord (IEC type)