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MedIOEx-V3 is industrial controller based Raspberry Pi.

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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

Image of MedIOEx-V3

Fig. IO Mapping

Digital Input

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

Raspberry Pi Pin Physical Pin BCM Adress
12 DI_1 BCM18
16 DI_2 BCM23
18 DI_3 BCM24
32 DI_4 BCM12
36 DI_5 BCM16
38 DI_6 BCM20
40 DI_7 BCM21
37 DI_8 BCM26
35 DI_9 BCM19
33 DI_10 BCM13
31 DI_11 BCM6
29 DI_12 BCM5
15 DI_13 BCM22
13 DI_14 BCM27
11 DI_15 BCM17
7 DI_16 BCM4

Image of MedIOEx-V3

Fig. Input Commissioning

Digital Output

MedIOExV3 provides SPI based Digital Output Control via Transistors.

Fan Output:

Raspberry Pi Pin Physical Pin BCM Adress
22 DO_FAN BCM25

MedIOExV3 uses MCP23S17 for digital outputs.

SPI output:

Physical Pin SPI Address
DO_1 0
DO_2 1
DO_3 2
DO_4 3
DO_5 4
DO_6 5
DO_7 6
DO_8 7
DO_9 15
DO_10 14
DO_11 13
DO_12 12
DO_13 11
DO_14 10
DO_15 9
DO_16 8

Image of MedIOEx-V3

Fig. Output Commissioning

Analog Input

MedIOExV3 uses MCP3208 (12bit) for analog inputs.

Analog Input Channel Channel Max. Voltage
AI_1 0-10V
AI_2 0-10V
AI_3 0-10V
AI_4 0-10V
AI_5 0-33V
AI_6 0-33V
AI_7 0-33V
AI_8 0-33V

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.

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MedIOEx-V3 is industrial controller based Raspberry Pi.

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