3. Commissioning
MF0150A4A.doc
Manual for ION-M7P/17EHP/19P
Page 25
3.2.4. 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 3-13 Grounding bolts
figure 3-14 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.
3.2.5. Connection
of
the Antenna Cables
The Remote Unit has one 4.3-10 type antenna connector labeled “ANT”.
When attaching the antenna cable connector, it is recommended to refer to the
corresponding documentation of the connector manufacturer. The bending radius of
the antenna cable must remain within the given specifications.
The selection of cable and antenna is an important consideration. On the one hand, a
cable with higher loss is less expensive but, on the other hand, it impairs
performance.
Notice:
Use an appropriate torque wrench for the coupling torques:
- for 7/16 DIN-type (25 N-m / 19 ft lb) with 1 ¼ in opening,
e. g. item no. 244377 available from the
CommScope e-catalog
- for 4.3-10 type connectors (5 N-m, 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 Remote
Unit.
