WARNING
Installation of the detachable HMI: A protective conductor (protective
earth) with a cross section at least 1.5 mm² (US: AWG14 or thicker) must be
connected to the protective grounding conductor terminal on the detachable
HMI at one end and on the other end to the protective grounding conductor
terminal on the device’s case. Both the detachable HMI and the device have
to be installed in the same substation.
In order to prevent personal injuries the communications cable installed to
the detachable HMI must never come in contact with parts that may be
subjected to dangerous live voltages.
It is prohibited to install or run the communications cable to the detachable
HMI next to high-voltage lines or high-voltage connections. This is to prevent
induced currents that would lead to electromagnetic interferences.
We recommend to use only cables of category CAT6 (or better), which we
tested up to a length of 10 m.
P634 5 Installation and Connection
5-2 P634/EN M/R-42-A // P634‑311‑653
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