Kentec Electronics DNP-R-2F/FC-K, Руководство пользователя

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16
Man-1572
DNP-R-2F/FC-K
RS-485 cable screen connection with the DNP R-2F/FC used in hybrid medium
mode
When the DNP R-2F/FC is used in hybrid medium mode, the screen on the metallic
conductor (cable) needs to be earthed on one of the two sides to provide a path to
ground any coupled signal interference. With both sides grounded, an unwanted path
for circulating currents is introduced. This single point grounding is displayed in
Figure 7.
Figure 7: Screen connections on an RS-485 cable link