Voltage measurement

The EP3356-0022 principally offers a 2-channel voltage measurement on one box with two very different measuring ranges of ±25 mV and ±12 V nominal voltage. The load on the one connected strain gauge can be calculated from the two simultaneously measured voltages; the EP3356-0022 already performs this calculation in the box and thus represents a 1-channel box in the sense of load calculation.

The following applies to the individual channels:

In the standard setting the EP3356-0022 operates as a 1-channel strain gauge monitor with the process image; the box can be switched to 2-channel voltage measurement by changing the process data. See the notes on the process image regarding this. If the EP3356-0022 is not used as a load measuring box, but rather as a 2-channel analog input measuring box, the following must be observed:

Voltage measurement 1:

Voltage measurement

In the voltage measuring mode the EL3356 is to be connected to external GND with a single-ended connection. In addition the internal GND reference is to be closed by the CoE switch SymmetricReferencePotential. The EP3356-0022 “supply” is not usable because the box internally generated 10 V. Voltage measurement 2: