
Shenzhen Hpmont Technology Co., Ltd
Chapter 4 Electrical Installation
HD20 Series Inverters User Manual
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21
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4.4.1 Control Terminal Description
Figure 4-4 Control terminal layout
Table 4-3 Control terminal function description
Item
Terminal
Name
Function Description
Analogue input
AI1
Anglogue input 1
Input voltage: 0
-
10V (input impedance: 32
kΩ
)
AI2
Anglogue input 2
Input voltage/current is selectable;
Input voltage: -10V
-
10V (input impedance: 32
kΩ
);
Input current: 0
-
20mA (input impedance:
500Ω
)
Analogue output
AO1
Anglogue output 1
Output voltage/current signal: 0
-
10V/0
-
20mA;
Programmable output
AO2
Anglogue output 2
Power source
+10V
+10V power supply
Analogue input use +10V as reference supply,
maximum output current is 100mA
GND
+10V power
reference ground
Analogue site, isolated to COM
P24
+24V power supply
Digital input use +24V as supply, maximum output
current is 200mA
SEL
Digital input
common terminal
Factory settings default SEL and P24 are connected.
Disconnected SEL and P24 when use external power
to drive DI1
-
DI6
COM
Digital reference
ground
Digital site, isolated to CME
Digital input
DI1
-
DI6
Digital input 1
-
6
Programmable bipolar optional input signal
Input voltage: 0
-
30VDC
DI1
-
DI5 input impedance: 4.7
kΩ
DI6 input impedance: 1.6
kΩ
DI6 can be selectable for high-frequency input,
max-frequency 50kHz
Digital output
DO1
Digital output 1
Programmable optical-coupled isolation, open
collector output
Output voltage: 0
-
30VDC, max-output current 50mA
CME
DO1 reference
ground
Isolated COM, default short connected COM;
Disconnect CME and COM if need isolation output
DO2
Digital output 2
Programmable optical-couple isolation, open collector
output or pulse frequency output can be selectable;
Output voltage: 0
-
30VDC, max-output current 50mA;
It is equal to DO1 while selecting open collector
output;
Select pulse frequency output, max-frequency 50kHz
Relay output
R1A/ R1B/
R1C
Relay contact
output
Programmable output, contact rating: 250VAC/3A or
30VDC/1A
R1B,R1C: normally closed;
R1A,R1C: normally open
+10 AI1 AI2 DI1 DI2 DI3 DI4 DI5 DI6 COM
R1A
COM
GND
AO1 AO2 P24 SEL
DO1
R1C
GND
COM CME
DO2 R1B
4