General

According to the manufacturer, the 750-491 terminal block is a 1-channel terminal block. However, if the terminal is added offline, it is listed in the selection dialog under the 2-channel terminals:

This is because this terminal returns two signals:

• Bridge voltage (U-D)

• Supply voltage (U-Ref)

If the terminal is detected via the Autodetect function, both signals are inserted automatically. The first signal is always U-D, the second signal is U-Ref.

The actual measured value must be calculated with both signals in ibaPDA using a virtual signal with the following formula:

Scaling

Both signals are assigned a measured variable of 10 when the input value is 20,000:

The bridge voltage U-D is measured in the unit "mV" and the supply voltage in the unit "V":