hpmont HD30 Series - Page 40

Chapter 4 Electrical Installation Shenzhen Hpmont Technology Co., Ltd
―32― HD30 Series Inverters User Manual
3
．
If the inverter’s internal 24V power supply is used, the common emitter output connection of
the NPN transistor in the external controller is as shown in Figure 4-20.
Figure 4-20 NPN signal input connection when using internal 24V power supply
4
．
If the inverter’s internal +24V power supply is used, the common emitter output connection of
the PNP transistor in the external controller is as shown in Figure 4-21. (Note that the SEL and
the P24 are not short-circuited)
Figure 4-21 PNP signal input connection when using internal 24V power supply
+ 3.3V
+
-
R
+ 24V
P24
SEL
DI1
+ 3.3V
+
-
COM
DI6
R
6
1
External
controller
+ 3.3V
+
-
R
+ 24V
P24
SEL
DI1
+ 3.3V
+
-
COM
DI6
R
6
1
External
controller