Honeywell Experion MX Operator's Manual page 43

There are two types of labels used that relate to grounding safety: Equipotential (see
Figure 37), and Earth (see Figure 38).
Grounding is required for safety and reliable operation of the electrical subsystems.
Before power is connected to the scanner, a safety ground should be terminated to the
scanner (see Figure 39).
6510020335
Equipotential Label
Fig. 37.
Earth Ground Label
Fig. 38.
Scanner Ground Termination
Fig. 39.
SCANNER SAFETY AND LOCAL CONTROLS
43