KE300A Inverter Mechanical and Electric Installation
41
0.022
uF,50V
C
External analog source
Cross in the same direction or wind 2
or 3 coils in the same direction
Ferrite bead
AI1
GND
Figure 3-16 Connection of analog Input
b) Digital input terminal
It needs to employ shielded cable generally, with cable length of no more than 20 meters. When active
driving is adopted, necessary filtering measures should be taken to prevent the interference to the power
supply.
It is recommended to use the contact control mode.
D1~D7 terminal connection:
NPN type
Figure 3-17 NPN type wiring
This is the most commonly used wiring connection, if external power supply is used, the +24V terminal
must disconnect with PLC terminal. The positive pole of external power supply should connect with PLC
terminal, and the negative pole connects with COM.
External controller
NPN
3.3
Ω
0V
COM
+VCC
Signal
+24
+24
D
3.3K
3.3K
D
PLC
Control board of inverter
