Installing
3.2 EMC-compliant installation of a machine or system
Power Module PM240-2
Hardware Installation Manual, 01/2020, A5E33294624B AL
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3.2.1 Control cabinet
● Assign the various devices to zones in the control cabinet.
● Electromagnetically uncouple the zones from each other by means of one of the following
actions:
– Side clearance ≥ 25 cm
– Separate metal enclosure
– Large-area partition plates
● Route cables of various zones in separate cable harnesses or cable ducts.
● Install filters or isolation amplifiers at the interfaces of the zones.
Control cabinet assembly
● Connect the door, side panels, top and base plate of the control cabinet with the control
cabinet frame using one of the following methods:
– Electrical contact surface of several cm² for each contact location
– Several screw connections
– Short, finely stranded, braided copper wires with cross-sections
≥ 95 mm² / 000 (3/0) (-2) AWG
● Install a shield support for shielded cables that are routed out of the control cabinet.
● Connect the PE bar and the shield support to the control cabinet frame through a large
surface area to establish a good electrical connection.
● Mount the control cabinet components on a bare metal mounting plate.
● Connect the mounting plate to the control cabinet frame and PE bar and shield support
through a large surface area to establish a good electrical connection.
● For screw connections onto painted or anodized surfaces, establish a good conductive
contact using one of the following methods:
– Use special (serrated) contact washers that cut through the painted or anodized
surface.
– Remove the insulating coating at the contact locations.
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