PN/CAN Gateway, PROFINET/CANopen Slave | Version 2 | 1/26/2021
13
4
Setup and wiring
4.1
EMC/safety/shielding
The PN/CAN Gateway complies with EU Directive 2004/108/EC (“Electromagnetic Compatibility”).
One effective way to protect against disturbances caused by electromagnetic interference is to shield
electric cables, wires, and components.
When setting up the system and routing the required cables, make sure to fully comply with all
standards, regulations, and rules regarding shielding. Precisely observe the corresponding texts of the
PROFIBUS user organization for setting up PROFINET and the setup guidelines of CANopen. All work
must be done professionally!
Shielding faults can result in serious malfunctions, including the system’s failure.
To ensure electromagnetic compatibility (EMC) in your control cabinets in electrically harsh
environments, the following EMC rules are to be observed in the design:
•
All metal parts of the cabinet are to be connected with each other over a large area with good
conductivity (no paint on paint). Where necessary, use contact washers or serrated washers.
•
The cabinet door must be connected to the ground straps (top, middle, bottom) over as short a
distance as possible.
•
Signal cables and power cables are to be laid separated spatially by a minimum distance of 20 cm
from each in order to avoid coupling paths.
•
Run signal lines only from one level into the cabinet if possible.
•
Unshielded cables in the same circuit (outgoing and incoming conductors) must be twisted if
possible.
•
Contactors, relays, and solenoid valves in the closet, or in adjacent cabinets if applicable, must be
provided with quenching combinations, e.g. with RC elements, varistors, diodes.
•
Do not lay wires freely in the closet; instead, run them as closely as possible to the cabinet housing
or mounting panels. This also applies to reserve cables. These must be grounded on at least one
end, and it is better if they are grounded at both ends (additional shielding effect).
•
Unnecessary line lengths should be avoided. Coupling capacitances and inductances are kept low
this way.
•
Analog signal lines and data lines must be shielded.
