Connection of passive-type analog sensors (current) to the analog inputs

The following figure shows the connection of passive-type analog sensors (current) to the analog input AI0. Proceed with the analog inputs AI1 to AI3 in the same way.

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Connection of passive-type analog sensors (current) to the analog inputs

The following measuring ranges can be configured DA502 - Digital/Analog Input/Output Module DA502 - Digital/Analog Input/Output Module:

Current 4…20 mA 1 channel used

For a description of the function of the LEDs, please refer to Diagnosis and displays / Displays DA502 - Digital/Analog Input/Output Module.

Attention

:strong:Risk of overloading the analog input!

If an analog current sensor supplies more than 25 mA for more than 1 second during initialization, this input is switched off by the module (input protection).

Use only sensors with fast initialization or without current peaks higher than 25 mA. If not possible, connect a 10-volt Zener diode in parallel to I+ and I-.

Unused input channels can be left open-circuited, because they are of low resistance.