Chapter 3 Electrical Installation Shenzhen Hpmont Technology Co., Ltd.
―18― HD3N-TC Series Inverter User Manual V1.0
Digital Output (DO) Connection
DO1 is open collective output. DO1 can use internal 24V power supply of inverter or external power
supply. The connection is shown in Figure 3-14.
Figure 3-14 Frame3 / Frame4 DO1 connection
DO2 is open collective output, refer to Figure 3-14.
DO2 is pulse frequency output; DO2 can use internal 24V power supply of inverter or external power
supply. The connection is shown in Figure 3-15.
Figure 3-15 Frame3 / Frame4 DO2 connection
DO1
+24V
Relay
coil
P24
DO1
+24V
P24
CME
CME
Relay
coil
12 - 30V
DC
COM
COM
+
-
Using external power supply
Using internal power supply
DO2
COM
+24V
R
P24
DO2
COM
+24V
R
P24
f
f
12 - 30V
DC
+
-
Using internal power supply
Using external power supply
R: 10kΩ pull-up resistor
f: Digital frequency meter