WAGO 750-527 Manual page 20

20 Device Description
Use supply modules for ground (earth)!
The I/O module has no power jumper contacts for receiving and transmitting the
earth potential. Use a supply module when an earth potential is needed for the
subsequent I/O modules.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-527 4DO 30V AC/DC 2.0A SSR