Connection of Active-type Analog Sensors (Current) with Electrically \ Isolated Power Supply to the Analog Inputs

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

Connection of active-type analog sensors (current) with electrically isolated power supply to the analog inputs

The following measuring ranges can be configured CI521-MODTCP and CI521-MODTCP:

Current	0…20 mA	1 channel used
Current	4…20 mA	1 channel used

The function of the LEDs is described under Diagnosis and displays / Displays CI521-MODTCP.

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

To avoid error messages through unused analog input channels in measuring range 4…20 mA, these channels should be configured as “Not used”.