ComBricks User Manual v6.4.0 | January 18| © PROCENTEC
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7.7
PROFIBUS DP cable specifications
The cable should comply with the PROFIBUS DP cable specifications for RS-485.
Table 4 - PROFIBUS DP cable specifications
Parameter
Value
Parameter
Value
Wires
2 (twisted)
Wire diameter
≥ 0.64 mm
Impedance
150 Ohm (3 to 20 MHz)
Wire area
≥ 0.32 mm
2
Capacity
≤ 30 pF/m
Shielding resistance
≤ 9.5 Ohm/km
Loop resistance
≤ 110 Ohm/km
Fig. 53 - PROFIBUS DP cable lengths
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