MC Technologies MC100 - Current Outputs 0 - 20 Ma; PT100; PT1000 Inputs

MC100
Mobile programmable gateway
MC Technologies GmbH, Kabelkamp 2, 30179 Hannover, Germany
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37
Port
Description
+A3
Positive connection output 3, sensor supply, approx. 12V to 14V
-A3
Negative connection Input 3
+A4
Positive connection output 4, sensor supply, approx. 12V to 14V
-A4
Negative connection Input 4
Function: Reading the current inputs
Port
Parameter
Read
Write
Path
+A3,-A3
Value
x
/sys/senst2_board/current_in/3
+A4,-A4
Value
x
/sys/senst2_board/current_in/4
Example: Read current at ADC input +A3,-A3
Command: cat /sys/senst2_board/current_in1/value
Response: e.g. 1500
Note: Conversion to mA
Formula: Current in mA = Value * 20 / 3000
Example: Value = 1500 corresponds to 10mA
Current outputs 0 - 20mA
Function: Output of a current
Port
Parameter
Read
Write
Path
OI1
Value
x
/sys/senst2_board/current_out/1
OI2
Value
x
/sys/senst2_board/current_out/2
Note: Conversion from mA to value to be supplied
Formula: Value = Current in mA * 1000
Example: Current = 6mA Corresponds to Value = 6000
PT100 / PT1000 Inputs
Function: Reading a resistance/temperature value
Port
Parameter
Read
Write
Path
RTD1
Value
x
/sys/senst2_board/rtd/1
RTD2
Value
x
/sys/senst2_board/rtd/2
RTD3
Value
x
/sys/senst2_board/rtd/3
RTD4
Value
x
/sys/senst2_board/rtd/4
Example: Read the value at RTD1
Command: cat /sys/senst2_board/rtd/1
Response: e.i. 100000
Conversion at port of a resistor in Ohm
Formula: Resistance in Ohm = Value / 100
Example: Value = 100000 corresponds 1000Ohm
Conversion at port of a PT1000 temperature sensor to °Celsius
Formula: Temperature in Grad Celsius = (Value / 100 -1000) / 3,891
Example: Value = 112000 corresponds to +30,84°Celsius
Value = 100000 corresponds to 0°Celsius
Value = 90000 corresponds to -25,5°Celsius