MID-7604/7602Power Drive 14 ni.com
Todetermine the maximum total power dissipation of all of the motors
combined,add up the maximum power each motor can dissipate. If this
valueis less than or equal to 80 W continuous, you will not exceed the
capabilities of the MID-7604/7602.
Ift he valueis greater than 80 W continuous, you may sti ll be within the
operating capabilities of the MID-7604/7602, since it is unlikely you will
run all of your motors simultaneously at their maximum levels. Make a
reasonable estimation of themaximum poweryour motors will require at
anygiven time and verify that this value is less than 80 W continuous.
Youcan configure the MID-7604/7602 stepper drivers in a current
reductionmode on a per-axis basis. This configuration is useful to
minimizemotor heating when you are not stepping. With current reduction
enabled,the current decreases by 50% when no stepping has occurred for
approximately 500 ms. DIP switch 5 controls current reduction on a
per-axisbasis. When this DIP switch is on, current reduction is enabled.
When this DIP switch is off,current reduction is disabled. The factory
defaultsett ingis current reduction enabled.
Table4 shows the available settings for DIP switch 5.
Table4. Current Reduction DIP Switch Settings
SwitchSetting Operation
Currentr eduction enabled
(factorydefault)
Currentreduction disabled
5
O
N
5
O
N