Morgensen MSI350 Series, User Manual, Page: 313 / 388

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The terminals are arranged as follows:
CME and COM are shorted through J3 before delivery, and J5 is the jumper for selecting the output
type (voltage or current) of AO2.
AI3 AO2 GND
COM CME Y2 S5 RO3A RO3B RO3C
PW +24V S6 S7 S8 RO4A RO4C
Indicator definition
Indicator No. Definition Function
LED1 State indicator
This indicator is on when the extension card is
establishing a connection with the control
board; it blinks periodically after the extension
card is properly connected to the control board
(the period is 1s, on for 0.5s, and off for the
other 0.5s); and it is off when the extension
card is disconnected from the control board.
LED4 Power indicator
This indicator is on after the IO extension card
is powered on by the control board.
The EC-IO501-00 extension card can be used in scenarios where the I/O interfaces of a MSI350
inverter cannot meet the application requirements. It can provide 4 digital inputs, 1 digital output, 1
analog input, 1 analog output, and two relay outputs. It is user-friendly, providing relay outputs through
European-type screw terminals and other inputs and outputs through spring terminals.
EC-IO501-00 terminal function description
Category Label Name Function description
Power PW
External power
supply
The working power of digital input is provided
by an external power supply.
Voltage range: 12–24 V
The terminals PW and +24V are shorted before
delivery.
Analog
input/output
AI3—GND Analog input 1
1. Input range: 0–10 V, 0–20 mA
2. Input impedance: 20 k
Ω for voltage input;
250 Ω for current input
3. Set it to be voltage or current input through
the corresponding function code.