Mettler Toledo GPro 500 Guide D'installation Rapide page 18

Quick Setup Guide TDL GPro™ 500
18
TB1
Pin 1
Connections on motherboard in the sensor head.
Note:­­ T he­sensor­head­cover­of­ATEX­version­should­never­been­
opened,­as­this­will­invalidate­the­ATEX­certification.
TB2
Pin 1
Connections on IO board in the sensor head.
All openings have to be closed with certified cable glands
or blocking plugs of the same degree of certification as the GPro™ 500.
It is essential that you observe all provided information
and warnings. The system must be closed and grounded
Pin 4
Pin 12
WARNING
WARNING
before switching on the system.