medioexV3

MedioexV3 is a new model of MedIOEx is retired.

Improvements:

• 16 ch Isolated digital input (0-7V False; 8-30V True)
• 16ch Transistor digital output (Each channel 500mA @ 24VDC)
• 8ch Analog Input (4ch 0-10V, 4ch 0-33V)
• More reliable power feed topology
• More reliable RS485 line
• Aluminum case for better cooling
• Controllable fan

Power

Min. power Requirements: 24VDC, 1A

Fig. IO Mapping

Digital Input

MedioexV3 has 16ch isolated Digital Input. You must tie COM to field GND.

Fig. Input Commissioning

Digital Output

MedIOExV3 provides SPI based Digital Output Control via Transistors.

Fan Output:

MedIOExV3 uses MCP23S17 for digital outputs.

Fig. Output Commissioning

Analog Input

MedIOExV3 uses MCP3208 (12bit) for analog inputs.

Function converts digital number to voltage for 33V channels:

#converts digital number to voltage
def rpi_dig_vol_converter(val):
    return val*33.0/4095.0

for 10V channels:

#converts digital number to voltage
def rpi_dig_vol_converter(val):
    return val*10.0/4095.0

Serial Port

Raspberry Pi 3 and 4 has ttyS0 port. You can tie cable screen to Shield Terminal.