Mechanical and Electrical Installation MD280/MD280N User Manual
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2˅Function Description of Control Terminal
Table 3-3 Function Description of MD280 Inverter Control Terminal
Type Terminal
Terminal
Name
Function Description
+10V-GND
External
terminal of 10V
power supply
Provide +10V power supply for external units,
with maximum output current of 10mA.
It is generally used as the operating power
supply for the external potentiometer.
The potentiometer resistance range is 1kȍ to
5kȍ.
Power supply
+24V-COM
External
terminal of 24V
power supply
Provide +24V power supply for external units. It
is generally used as the operating power supply
for digital input/output terminal and the external
sensor.
Maximum output current: 200mA
AI1-GND
Analog input
terminal 1
1. Input voltage range: DC 0V to 10V (can be
customized as non-standard -10VDC to
+10VDC)
2. Input impedance: 20kȍ
Analog
input
AI2-GND
Analog input
terminal 2
1. Input voltage range: DC 0V to 10V (can be
customized as non-standard -10VDC to
+10VDC)/0mA to 20mA, the selection of which
depends on jumper J1 on the control panel.
2. Input impedance: 20kȍ at the time of voltage
input; 500ȍ at the time of current input.
3. Keyboard potentiometer input: It can switch
between AI2 and external keyboard
potentiometer via Jumper J2.
DI1-COM 1Digital Input 1
DI2-COM Digital Input 2
DI3-COM Digital Input 3
DI4-COM Digital Input4
1. Optical coupling isolation.
2. Input impedance: 3.3kȍ
Digital
Input
DI5-COM
High-speed
pulse input
terminal
In addition to the characteristics of DI1 to DI4, it
can also be used as the high-speed pulse input
channel.
Maximum input frequency: 50kHz.
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