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.

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

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

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.