janitza ProData 2, Инструкция по эксплуатации и технические данные

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17
ProData II
Screening
Twisted screened cable should be used for connections
via the RS485 interface.
• Earth the screens of all cables that lead to the cabinet
upon entering the cabinet.
• Connect the screens over a generous area and in
a manner that will conduct well to a low-noise earth.
• Gather the cables mechanically above the earthing
clamp in order to avoid damage due to cable
movements.
• Use suitable cable glands to feed the cables into
the cabinet - e.g. armoured conduit couplings.
Cable type
The cable used must be suitable for an environmental
temperature of at least 80 °C.
Recommended cable types:
Unitronic Li2YCY(TP) 2x2x0.22 (from Lapp Kabel)
Unitronic BUS L2/FIP 1x2x0.64 (from Lapp Kabel)
Maximum cable length
1200 m at a baud rate of 38.4 kbits.
Fig. Screening procedure at cabinet entry.
Cable
Strain relief
Screen braid of the cable
Earthing clamp
Low-noise earth