Micro PLC-FB Analog Interface
| Pin Name | Description |
|---|---|
| AD1 | Analog Input Channel 1 Terminal |
| AD2 | Analog Input Channel 2 Terminal |
| DAV1 | Analog Voltage Output Channel 1 Terminal |
| DAV2 | Analog Voltage Output Channel 2 Terminal |
| DAI1 | Analog Current Output Channel 1 Terminal |
| DAI2 | Analog Current Output Channel 2 Terminal |
| ACOM | Analog I/O COM |
ACOM terminal is an electric potential of the entire embedded analog I/O signals. For the transmission of the embedded analog I/O signals, ACOM must be wired together.
Analog Input Select Switch
Switch
Measuring Voltage (Switch OFF)
Measuring Current (Switch ON)
Internal analog input port uses a 250Ω precision resistor. Connecting the shunt resistor (250Ω) by controlling the analog input select switch will enable the measurement of current (0mA ~ 20mA).
Depending on the ON/OFF state of the switch, the impedance value may change.
The switch must be switch to ON only when current is measured.
To measure voltage, the switch must be OFF.