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magne t
MAGSYS
systeme
If the power supply of the interface is 5 V, we recommend 390
approx. 1 k to power supply and 390
9.3.3 EIA-485 Cable Details
A shielded, twisted two-wire line is used for the bus wiring.
The following parameters are recommended for the cable:
Conductor cross section
Stranded wire
Stranding
Total shielding
Conductor resistance
Insulation resistance
Operating voltage
Test voltage
Load capacity
Capacity
Line length
9.3.4 EIA-485 Wiring Details
When wiring the bus cable pay attention to an EMC-compatible assembly.
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Bus t erminal
Shielding
Ground
Figure 25 EIA-485 Shielding and Potential Equalization
The bus line can be layed in one cable channel together with other data lines
and unshielded lines for DC less than 60 V and unshielded lines for AC less
than 25 V.
The bus line must not be layed together with unshielded lines for DC
between 60 V and 400 V. In this case, a minimum distance of 10 cm should
be maintained.
Keep a minimum distance of 1 m from electric sources of interference.
The cables should be layed as short as possible between two devices.
Gaussmeter IGM11 Operating Instructions
to common ground).
Data line
Potential equalization
2 × 0.5 mm²
≥ 16× ≤ 0.2 mm
≥ 20 twisting rotations/m
Mesh wire, tinned copper wire ⌀ ≥ 1.1 mm²,
≥ 85 % optical cover
≤ 40
/km
≥ 200 M /km
≥ 300 V
≥ 1500 V
≥ 5 A
≤ 120 pF/m
≤ 1200 m
Chapter 9 Serial Interfaces
resistors (with 15 V
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