Mettler Toledo WMC Serie Manual De Usuario página 5

Safety notes
CAUTION
Risk of electric shock
The weigh modules may only be connected to DC power sources that meet the 12VDC +/-3%
at all times.
The power supply must be approved by the respective national test center of the country in
which the weigh module will be used.
Weigh Modules Safety Information​ ​ 5