Hans Turck BL20-ECO, Инструкция по эксплуатации

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Guidelines for Electrical Installation
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8.4.1 Potential compensation
Potential differences can occur between installation components that are in separate areas if these

are fed by different supplies,

have double-sided conductor shields which are grounded on different installation components.
A potential-compensation cable must be routed to the potential compensation.
A potential compensation cable must have the following characteristics:

Low impedance. In the case of compensation cables that are routed on both sides, the compen -
sation line impedance must be considerably smaller than that of the shield connection (max. 10%
of shield connection impedance).

Should the length of the compensation cable be less than 200 m, then its cross-section must be
at least 16 mm
2 /
0.025 inch
2
. If the cable length is greater than 200 m, then a cross-section of at
least 25 mm
2/
0.039 inch
2
is required.

The compensation cable must be made of copper or zinc coated steel.

The compensation cable must be connected to the protective conductor over a large surface
area and must be protected against corrosion.
Connection 1 Connection 2
CAN_H 0 --------- 0 CAN_H
CAN_L 0 --------- 0 CAN_L
GND 0 --------- 0 GND
Abb. 4: Potential compensation
Bezugspotenzial
Potenzialausgleichsleitung
Schirm
Bezugspotenzial