Wiring Protection; Protecting The Vfd And Input Power Cable In Short Circuit - Kruger Ecowatt K320 Series Operation Manual

Ecowatt Drive K320 series
®
Note: The USB port can be used to upgrade the software, and the keypad port can be used to
connect an external keypad. The external keypad cannot be used when the keypad of the VFD
is used.
If input signal comes from NPN transistors, set the U-type short connector between +24V and
PW based on the power used according to the following figure.
S1
S2
COM
PW
+ 24V
Internal power（NPN mode）
If input signal comes from PNP transistor, set the U-type short connector based on the power
used according to the following figure.
S1
S2
COM
PW
+ 24V
Internal power（PNP mode）

4.5 Wiring protection

4.5.1 Protecting the VFD and input power cable in short circuit

The VFD and input power cable can be protected during short-circuit to avoid thermal
overload.
Carry out protective measures according to the following requirements.
COM
+ 24V
Figure 4-17 NPN mode
COM
+ 24V
Figure 4-18 PNP mode
S1
S2
COM
+ 24V
PW
+ 24V
External power（NPN mode）
S1
S2
COM
PW
+ 24V
External power（PNP mode）
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Installation guidelines
COM
+24V
COM
+ 24V