MASI65-M12 User's manual
20 V 1.1
2.4.4 Cable cross-sections
The chief determining factor in selecting a suitable transmission cable in regard to energy transfer is the
DC resistance.
Initial conditions :
Ÿ the cable length is 100 m
Ÿ 31 slaves are connected to the cable at regular intervals, and
Ÿ the current consumption of 65 mA is the same for all slaves (total current : 2 A)
The table below shows the resulting drop of voltage between the power supply inputs and the connecting
point of the last slave :
Cable cross-section in mm² 0,75 1,5 2,5
DC resistance in mOhm/m 52,0 26,6 16,0
Max. voltage drop in en V 5,4 2,7 1,6
Table 2.4–1 : Influence of various cross-sections
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