User's Manual

4. Commissioning
User’s Manual for ION
®
-U Page 27
4.3.4. Grounding (Earthing)
The RU must be grounded (earthed).
When double grounding lugs are used they must support M6 studs with a stud hole
spacing of 15.88 mm (5/8”).
1. Connect an earth-bonding cable to one or both of the grounding bolt connections
provided on the connector flange of the Remote Unit. Do not use the grounding
connection to connect external devices.
figure 4-12 Grounding bolts figure 4-13 Grounding bolt, schematic view
2. After loosening the hex nut(s), connect the earth-bonding cable between the two
washers as illustrated in the figures above.
3. Then, fasten all parts again by tightening the hex nut(s).
4. Connect the other end of the ground wire to a suitable permanent ground.
Note: Ground of a second unit (for example RU + EU) has to be connected to the
same equipotential bonding terminal as the Remote Unit. Use bonding cables
of the same length, as short as possible, and with a large wire cross section.
Follow local electrical code practices.