The 3,5 mm switch offers four different options:
a) Hard grounded without plug (original delivery)
b) Equipotential bonding: with plug, compensation line on center contact
c) Potential free: with plug
d) Soft grounded: with plug and soldered resistor grounded via selected resistor
USB interface:
USB interface in front of firmware updates, parameterization and monitoring
USB interface supports all standard USB flash drive types