Editable controller module 3BSE008884R1

Editable controller module 3BSE008884R1

Editable controller module 3BSE008884R1

• Initially, use the original cabling from the supplier primarily.
• Use shielded cables for RS232 communication.
• Use twisted pair and shielded cabling for RS422 and RS485.
• 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 + braided shield.
• D-sub covers should be shielded, and the shield should be connected to the cover 360 ° where the cable comes in.

• 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.
• Ferrite cores that are snapped onto the shielded cabling may remove minor disturbances. Large ferrite pieces that are snapped onto unshielded cabling and where the wires go 2-4 times around the cores are approximately 5-25 times more efficient.

In most cases, the ambient temperature for the operator panel is significantly higher
than the device cabinet’s ambient temperature.
If the cabinet is tall and there are a number of heat-generating devices, the
temperature at the top of the cabinet will be considerably higher than the theoretical
temperature increase that would be expected. All electronics are sensitive to heat.
The lifespan of an electrolytic capacitor is cut in half with an 8-10 °C increase in
temperature. A 15-20 °C temperature increase results in a quarter of the lifespan etc.
Rittal has a good program for estimating the anticipated average temperature in the
cabinet as well as a large program for controlling the temperature in the device
cabinet.
An enamel-coated steel cabinet has a radiant heat value of 5.5 W/m2 and °C.
Installing a fan inside the cabinet will even out the temperature, while moving air
provides considerably better cooling than still air. A suitable fan is a 120 x 120 mm
axial fan, available in 24 V DC, 115 and 230 V AC.
Install the fan so that it sits in the cooler area and will blow cold air against the
operator panel. If the fan is mounted at the top and sucks air upwards, the fan’s
ambient temperature will be higher = shorter lifespan.
A good fan with a ball-bearing mounting has an expected lifespan of at least 40,000
hours (not a guaranteed lifespan) at 40 °C. This corresponds to at least 4 years of
continuous use. If a thermostat is installed, the fan only needs to come on when
needed.
Large graphic terminals draw only one fifth of the current when the background
lighting is off. The loss effect drops from e.g. 2