Promag 53 PROFIBUS-DP/-PA 4 Wiring
Endress+Hauser 59
4.4.2 Special cases
Equalising currents in metallic, ungrounded pipes
To prevent disturbances to the measurement, we recommend that both sensor flanges
be connected with a grounding cable to the adjacent pipe flange and to ground. Con-
nect the transmitter or sensor connection housing, as applicable, to ground potential by
means of the ground terminal provided for the purpose (Fig. 37).
Note:
The grounding cable for flange-to-flange connections can be ordered separately as an
accessory from E+H
→ Page 111.
• DN ≤ 300: the grounding cable is in direct connection with the conductive flange coa-
ting and is secured by the flange screws.
• DN ≥ 350: the grounding cable connects directly to the metal transport bracket.
Fig. 37: Potential equalisation with equalising currents in metallic, non-grounded piping systems
6 mm² Cu
DN 300≤
DN 350≥
F06-5xxxxxxx-04-xx-xx-xx-003
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