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.

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

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

Current

4…20 mA

1 channel used

The function of the LEDs is described under Diagnosis and displays / Displays Digital/Analog Input/Output Module DA502.

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.