Shenzhen Hpmont Technology Co., Ltd
Chapter 4 Electrical Installation
HD20 Series Inverters User Manual
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25
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Source (drain) connections
1. If the external power supply is used, the source connection is as shown in Figure 4-9. (Note
that the SEL and the P24 are not short-circuited)
Figure 4-9 Source input connection when using external power supply
2. If the external power supply is used, the drain connection is as shown in Figure 4-10. (Note
that the SEL and the P24 are not short-circuited)
Figure 4-10 Drain input connection when using external power supply
+ 3.3V
+
-
R
+ 24V
P24
SEL
DI1
+ 3.3V
+
-
COM
DI6
R
6
1
12
－
30V
DC
+
-
External
controller
Source connection
using external power
+ 3.3V
+
-
R
+ 24V
P24
SEL
DI1
+ 3.3V
+
-
COM
DI6
R
6
1
DC 12
－
30V
+ -
External
controller
Drain connection
using external power
4