Simons Voss Technologies SmartRelais 3 Reader Guide Abrégé page 28

4. Connections
Ground loop through shielding
Physically separated devices can have a slightly different earth potential. A screen con-
nected on both sides represents a second earth connection through which this potential
difference is balanced. The current arising from this can disrupt the data transfer.
Only connect the screen on one side to the common ground potential (either on the

controller or the reader - for reasons of space, connection to the controller is recom-
mended).
28 / 132
SR30HYS_F
SimonsVoss
SE
NRF
1 2 3 4 5
- -
+
A B
SmartRelais 3 Reader
EN