Inovance MD500-PLUS Series - Page 32

System Structure
‑31‑
Table 3–5 Description of control circuit terminals
Item
Terminal
Code
Terminal Name
Function
Power
supply
+10V‑GND
External +10 V
power supply
Provides +10 V power supply to an external
unit. Its maximum output current is 10 mA.
Generally used to supply power to an
external potentiometer with resistance
ranging from 1 kΩ to 5 kΩ.
+24V‑COM
External +24V
power supply
Provides +24 V power supply to an external
unit. It is generally used to supply power to
digital input/output terminals and external
sensors.
Maximum output current: 200 mA
Analog
input
AI1‑GND
Analog input
terminal 1
Input voltage range: –10 VDC to +10 VDC
Input impedance: 22 kΩ
AI2‑GND
Analog input
terminal 2
Input range: –10 VDC to +10 VDC/0 mA to
20 mA, determined by the J7 jumper on the
control board
Input impedance: 22 kΩ (voltage input), or
250 Ω to 500 Ω (current input), switchable
by using jumper cap J9.
AI3‑GND
Analog input
terminal 3
Input range: –10 VDC to +10 VDC/0 mA to
20 mA, determined by the J5 jumper on the
control board
Input impedance: 22 kΩ (voltage input) or
500 Ω (current input)
AI3 supports inputs of PT100, PT1000, KTY‑
84‑130, and PTC130 temperature sensors,
switchable by using F9‑56.
Digital
input
DI1‑COM
Digital input 1 Photocoupler isolation. The input
frequency is below 100 Hz. The J1 jumper
on the control board can be used to switch
between an external power supply and an
internal power supply.
Input impedance: 1.39 kΩ
Voltage range for effective level input: 9 V
to 30 V
DI5 can be used for high‑speed pulse input.
Maximum input frequency: 100 kHz Input
impedance: 1.03 kΩ
DI2‑COM
Digital input 2
DI3‑COM
Digital input 3
DI4‑COM
Digital input 4
DI5‑COM
Digital input 5