Connection of active-type analog sensors (voltage) with no electrically \ isolated power supply

The following figure shows the connection of active-type sensors (voltage) with no electrically isolated power supply.

Connection of active-type sensors (voltage) with no electrically isolated power supply. 1 analog sensor requires 1 channel.

Caution

If AGND is not connected directly to ZP at the sensor, the supply current flows via the AGND line to ZP. Measuring errors can occur caused by voltage differences (voltage drops) between ZP and AGND.

The following measuring ranges can be configured AI531 Analog Input Module AI531 Analog Input Module:

Voltage	-50 … +50 mV	1 channel used
Voltage	-500 … +500 mV	1 channel used
Voltage	-1 … +1 V	1 channel used
Voltage	-5 … +5 V	1 channel used
Voltage	-10 … +10 V	1 channel used
Voltage	0 … +5 V	1 channel used
Voltage	0 … +10 V	1 channel used

The function of the LEDs is described under Diagnosis and displays / displays AI531 Analog Input Module.

In order to avoid error messages or long processing times, it is useful to configure unused analog input channels as “unused”.