0 V cables

Never connect 0V cables GND. ­The 0 V cables of several electrical units which are connected should not be looped from unit to unit, but rather wired up in a star configuration. This means:

• Install the units in adjacent control cabinet compartments rather than distributing them widely.
• Lay the 0 V cables with at least 1 mm² (AWG17) cross section from a central point to each individual unit by the shortest possible route.