If a rack has unused module slots, install a BMXXEM010 cover to keep dust and other objects out of the slots and to comply with IP20 ingress protection requirements.
BMXXEM010 covers are sold in sets of 5.
Position the locating pin at the rear of the protective cover (lower part of the module) in the centering hole of the unused module slot.
Swivel the protective cover towards the top of the rack so that it sits flush with the rack.
Tighten the mounting screw to hold the protective cover in place on the rack.
Tightening torque: 0.4...1.5 N•m (0.30...1.10 lbf-ft).
Here a cover is placed in an unused module slot in a Modicon X80 rack:
