D301087 0308 - BL20 CANopen 7-7
Electromagnetic Compatibility (EMC)
7
Electromagnetic Compatibility (EMC)
BL20 products comply in full with the requirements pertaining to
EMC regulations.
Nevertheless, an EMC plan should be made before installation.
Hereby, all potential electromechanical sources of interference
should be considered such as galvanic, inductive and capacitive
couplings as well as radiation couplings.
Ensuring Electromagnetic Compatibility
The EMC of BL20 modules is guaranteed when the following basic
rules are adhered to:
Correct and large surface grounding of inactive metal compo-
nents.
Correct shielding of cables and devices.
Proper cable routing – correct wiring.
Creation of a standard reference potential and grounding of all
electrically operated devices.
Special EMC measures for special applications.
Grounding of Inactive Metal Components
All inactive metal components (for example: switchgear cabinets,
switchgear cabinet doors, supporting bars, mounting plates, tophat
rails, etc.) must be connected to one another over a large surface
area and with a low impedance (grounding). This guarantees a stan-
dardized reference potential area for all control elements and
reduces the influence of coupled disturbances.
In the areas of screw connections, the painted, anodized or
isolated metal components must be freed of the isolating layer.
Protect the points of contact against rust.
Connect all free moving groundable components (cabinet doors,
separate mounting plates, etc.) by using short bonding straps to
large surface areas.
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