MID-7604/7602 Stepper Power Motor Drive User Guide
6
ni.com
Front Panel Switches
Figure 1 shows the front panel of your MID-7604/7602. The DIP switches are shown with the
detachable metal cover plate removed.
Figure 1.
MID-7604/7602 Front Panel
Note
Items followed by an asterisk (*) are available on the MID-7604 only.
The two rocker switches on the MID-7604/7602 front panel are the AC POWER and ENABLE. Figure 1
shows the location of these switches.
The AC POWER switch energizes the motor bus (+24 V) and the logic (+5 V) power supplies. When
switched on, the green power LED labeled
+5 V
illuminates. If this LED fails to illuminate, check the
power cord and main input fuse on the front panel.
The ENABLE switch enables or inhibits the stepper drivers. If the ENABLE switch is in the inhibit
position (off), the stepper drivers are inhibited, and the yellow LEDs (the middle row of the LED status
array) and red LEDs (the top row of the LED status array) illuminate for all axes. Refer to the
section of this guide for more information.
Note
In older versions of the MID-7604/7602, the red status LEDs do not illuminate when the
yellow status LEDs illuminate. This behavior only occurs in newer versions of the MID-7604/7602.
Both the AC
POWER and ENABLE switches can inhibit the stepper drivers. However, as long as the
AC
POWER switch is on, only the stepper driver output stages are disabled. The remaining circuitry
remains active, including the quadrature encoder circuit.
Caution
You
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
section of this guide for fuse
specifications.
1
Main Input Fuse
2
Line Voltage Select Switch
3
Power Switch
4
Green Power LED
5
Enable Switch
6
Axis 1 DIP Switch Bank
7
Axis 2 DIP Switch Bank
8
Axis 3 DIP Switch Bank*
9
Axis 4 DIP Switch Bank*
10 LED Status Array
FU
S
E
LINE VOLTAGE
S
ELECT
AC POWER
1
AXI
S
2
3
4
ON
OFF
+5V
ON
OFF
ENABLE
AXI
S
CONFIGURATION
1
2
3
4
10
5
ON
ON
ON
ON
FAULT
S
INHIBIT
S
LIMIT
S
6
7
8
9
