©NationalInstruments Corporation 9 MID-7604/7602Power Drive
Caution Besu re to turn offthe ENABLE switch and the main AC power to your
MID-7604/7602 and host computer before connecting the accessory to your motion
controller.
Warning Thestepper motor connectors on this drive are energized when the unit is
poweredon. Disconnect the MID-7604/7602 unit from the power outlet before connecting
wirest o ordisconnecting 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 interfacecabl et o connect the motion controller to the
MID-7604/7602.Wire the motor power, limit switch, encoder, and I/O
terminalbl ocks 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.
Forproper operation, you must set this swi tch to match your power
source.
Caution You must change the MID-7604/7602 main input fuse on the front panel if you
changethe 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 ACconnector and
plug it in to a correctly rated powerso urce.
Host Bus Interlock Circuit
The MID-7604/7602 has a host bus interlock circuit that monitors the
presenceof +5 V from the host computer and disablesthe MID-7604/7602
when the voltageis not present or falls out of tolerance. This circuit shuts
downthe 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
Thefront panel LEDs consist of a single green LED to indicate if the mai n
poweris active and an LED status array of 3 rows by 4 columns that
providesa variety of status information. Refer to Figure 1 for the location
oft hef ront panel LEDs.