Emc Installations; Data Security - WAGO 750 Series Manual

Serie 750, 753
• Use countersink-head screws, blind rivets, etc., to countersink the attachment points
beneath the node structure.
• The component DIN-rail contact (CuSn6) must not form a galvanic element with the
DIN-rail that is capable of generating a differential voltage of more than 0.5 V (saline
solution of 0.3% at 20°C/68°F).

5.2.8 EMC Installations

• Use filter modules for 24 V power supply lines longer than 30 m.
To comply with EN 61000-6-2:2019, filter modules (750-626/xxx-xxx or 750-624/xxx-
xxx) must be used for both system and field power supply lines that are longer than 30
m.
• Ground DIN-rails.
Ground the DIN-rails to divert electromagnetic interference.
• Use shielded cables for data and signal lines.
Electromagnetic interference is reduced and signal quality increased. Measurement er-
rors, data transmission faults and interference due to excessive voltage can be pre-
vented!
• Keep data and signal lines separate from interference sources.
Route data and signal lines separately from all power supply cables and other sources
of high electromagnetic emissions (e.g., frequency converters or drives).
• Connect the cable shielding with the ground potential.
Integrated shielding is mandatory to meet technical specifications regarding measure-
ment accuracy. Establish the connection between the cable shielding and ground po-
tential at the inlet of the cabinet or housing. This grounding allows induced interfer-
ences to dissipate and be kept away from devices in the cabinet or housing.
• Improve shielding performance with a large contact area.
A low-impedance connection between shielding and ground achieves better shielding
performance. For this purpose, connect the shielding over a large surface area, e.g.,
using the WAGO Series 790 Shield Connection System. This is especially recom-
mended for large-scale systems where equalizing or high impulse currents may occur.

5.2.9 Data Security

Professional planning and design is an important requirement for securing data confiden-
tiality, availability and integrity.
Random Influences
Data transmission and processing can be disrupted by random influences, such as tem-
porary electromagnetic disturbances. Proper setup can significantly reduce the likelihood
of corruption or destruction of data.
For additional information see:
Deliberate Influences
Use in ETHERNET Areas
ETHERNET products are designed for use in local networks. Please note the following
when using ETHERNET products in your system:
System manual | Version: 3.3.1
8 EMC Installations [} 33].
Planning
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