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7.5 Current Limit Trimpot (CL)
The CL Trimpot is used to limit the maximum current (torque) to the motor. The CL also protects the control
from excessive current during startup. The CL Trimpot is factory set to 150% of the full load current rating
of the motor. To increase the current limit, rotate the CL Trimpot clockwise (do not exceed 200% of the full
load current rating of the motor (maximum clockwise position)). To decrease the current limit, rotate the
CL Trimpot counterclockwise. On cyclical loads, it may be normal for the CL LED to momentarily flash.
(Visible only if the cover is removed.) The CL Trimpot range is 0% – 200% of the full load current rating of
the motor. Some application may require a lower value so as not to damage process material or drive train
components.
See Figure 7-5.
Note:
In order for the Current Limit to operate properly, the correct Plug-In Horsepower Resistor® must
be installed for the particular motor and input voltage being used, as described in Section 4.
Calibration of the CL Trimpot is normally not required when the proper Plug-In Horsepower
Resistor
®
is installed.
Figure 7-5 CL Trimpot Range
