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© National Instruments Corporation 9 MID-7604/7602 Power Drive
Caution
Be sure to turn off the ENABLE switch and the main AC power to your
MID-7604/7602 and host computer before connecting the accessory to your motion
controller.
Warning
The stepper motor connectors on this drive are energized when the unit is
powered on. Disconnect the MID-7604/7602 unit from the power outlet before connecting
wires to or disconnecting wires from the stepper connectors. Strip back the insulation of
the stepper wires to the stepper connectors no more than 7 mm. Failuretodosocould
result in electric shock leading to serious bodily injury or death.
1. Use the interface cable to connect the motion controller to the
MID-7604/7602. Wire the motor power, limit switch, encoder, and I/O
terminal blocks as described in this guide and to your specific system
requirements.
2. Use the LINE VOLTAGE SELECT switch to configure the
MID-7604/7602 for 115 VAC, 60 Hz or 230 VAC, 50 Hz operation.
For proper operation, you must set this switch to match your power
source.
Caution
Yo u must change the MID-7604/7602 main input fuse on the front panel if you
change the line voltage from the factory setting. Refer to the Specifications section of this
guide for fuse specifications.
3. Finally, install the power cord into the back panel AC connector and
plug it in to a correctly rated power source.
Host Bus Interlock Circuit
The MID-7604/7602 has a host bus interlock circuit that monitors the
presence of +5 V from the host computer and disables the MID-7604/7602
when the voltage is not present or falls out of tolerance. This circuit shuts
down the stepper drives for all axes by activating the inhibit when the host
computer is disconnected from the MID-7604/7602 or inadvertently shut
down. Activation of the host bus interlock circuitry illuminates the yellow
LEDs (middle row)of the LED status array for all axes.See the Front Panel
LEDs section of this guide for more information.
Front Panel LEDs
The front panel LEDs consist of a single green LED to indicate if the main
power is active and an LED status array of 3 rows by 4 columns that
provides a variety of status information. Refer to Figure 1 for the location
of the front panel LEDs.