Installation Of Option Boards; Galvanic Isolation Barriers - Danfoss VACON NXS Series Operating Manual

Operating Guide | VACON® NXS/NXP Air-cooled
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Illustration 53: OPTA3

7.4 Installation of Option Boards

For information on how to install the option boards, see the option board manual or VACON

7.5 Galvanic Isolation Barriers

The control connections are isolated from mains. The GND terminals are permanently connected to I/O ground. See
The digital inputs on the I/O board are galvanically isolated from the I/O ground (PELV). The relay outputs are also double-isolated from
each other at 300 VAC (EN-50178).
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NX I/O Boards User Manual.
illustration
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Control Unit
54.