4.4.7.7 External supply of the load cells
If the total resistance of the load cells is ≤75 (e.g., more than 4 load cells with 350 ),
an external load cell supply is required. In this case, the internal supply is replaced by a
potential-free external supply.
The center of the external supply voltage (0 ext. supply) should be connected to GND to
ensure that the voltage reacts symmetrically to 0.
The internal supply is not connected.
If the external supply is <8 V DC (±4 V DC), the supply at - [Weighingpoint]- [WP A]-
[Calibration]- [Param]- [External supply] has to be set to "below 8 V DC" in order to
reduce the sense voltage to below approx. ±4 V DC.
4.4.7.8 Connecting to input/output interface PR 1626/60
Connections are made via connecting cable PR 6135/.. .
The internal load cell supply voltage (V+, V-) of the PR 5220 must not be connected.
4 Device installation Transmitter Series PR 5220
EN-43 Minebea Intec
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