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Additional Installation Tips
A good solution may be to use a shielded Ethernet cable, but to connect the shield at one end only.
One option is to break the shield, see 3 in drawing above.
A more elegant method is to expand the shielded Ethernet cabling with a piece of unshielded Ethernet cable, see 4 in drawing above.
The shield can be grounded via an external 0.1 μF/250 V film capacitor, see 5 in drawing above. This connects the HF transients to ground.
7.3 To Achieve Better EMC Protection
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Initially, use the original cabling from Beijer Electronics primarily.
Place the 24 V DC and communications cabling in one cable trunk/cable duct and 230/380 V AC in another. If the cables need to be crossed, cross them at
90° only. Avoid combining the cabling for stronger 24 V DC outputs with the communication cabling.
Use shielded cables for RS-232 communication.
Use twisted pair and shielded cabling for RS-422 and RS-485.
Use the cabling intended for the bus type; Ethernet, Profibus, CC-Link,
CAN, Device Net etc.
Install and connect according to applicable specifications for the relevant bus standard.
Use shielded cabling for Ethernet, preferably with foil and a braided shield.
D-sub covers should be shielded, and the shield should be connected to the cover 360° where the cable enters.
Connect the shield at both ends.
Ground plate
Ground plane 1
Shielded cable
0.1 μ F/250 V
Ground plane 2
Not same potential
Ground plate in another building
With longer distances, there is a risk that the ground potential may be different. In that case, the shield should only be connected at one end. A good alternative is to connect the other end of the shield to the ground via a 0.1 μF/250 V film capacitor.
Both ends are then connected to the ground in terms of HF, but only connected to the ground at one end in terms of LF, thus avoiding the 50/60 Hz grounding loops.
Metal cabinet
Terminal or connector
Metal cabinet
Terminal or connector
Cable clamp in steel
EMC cable gland
Shielded cable
Plastic cable gland
Shielded cable
Beijer Electronics, MAEN256B 25
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Key Features
- Built-in functions for displaying and controlling text, dynamic indication, time channels, alarm and recipe handling.
- Connects to various automation equipment such as PLCs, servos or drives.
- UL and cUL certified for use in hazardous locations.
- IECEx/ATEX certified for use in Zone 2/22 hazardous areas.
- IP66 rated for protection against dust and water.
- Wide operating temperature range (-20°C to +60°C).
- High screen resolution (1280 x 800 pixels).
- Capacitive touch screen for precise control.