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

Standard ranges

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Connection example

Caution

If AGND is not directly connected 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 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

Common mode range (+/-20 V)

../_images/edee4b838cf91e820a317f347b244f7f

Connection example

Caution

If AGND is not directly connected 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 measuring range can be configured AI531 - Analog Input Module AI531 - Analog Input Module:

Voltage Common mode voltage 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”.