User Manual

4. Commissioning
Page 26
MF0150A9A Manual for ION-M23 SDARS
4.2.4. Grounding (Earthing)
Grounding must be carried out. Connect an earth-bonding cable to the grounding
connection provided at the outside of the Remote Unit (see section 4.2.3). Do not use
the grounding connection to connect external devices.
figure 4-7 Grounding bolt (left) and schematic view (right)
After loosening the hex nut, connect the earth-bonding cable between the two
washers as illustrated in the above. Then, fasten all parts again with the hex nut.
 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.
4.2.5. Connection of the Antenna Cables
The Remote Unit either has three 4.3-10 type antenna connectors, labelled “ANT1”,
“ANT2”, and “ANT3”, or one 4.3-10 type antenna connector, labelled "ANT". Please
refer to section 4.2.3 for their location. Refer to the corresponding documentation of
the connector manufacturer for mounting the cable connectors. The bending radius
of the antenna cables must remain within the given specifications.
Choose the type of cable best suited for the antenna. Consider that a cable with
higher loss is less expensive but impairs performance.
Notice: Use an appropriate torque wrench for the coupling torques:
→ for 4.3-10 type connectors (5 Nm, 44 in lb) with 22 mm (7/8) in
opening, e.g. item no. TW-4310
Do NOT use your hands or any other tool (e.g. a pair of pliers)! This might
cause damage to the connector and lead to a malfunction of the RU.
Attention: To minimize passive inter-modulation (PIM) distortion, attention has to be
paid to the physical condition of the connector junctions:
• Do not use connectors that show signs of corrosion on the metal surface.
• Prevent the ingress of water or dirt into the connector.