Installation Guide

Installing the iRM4451
iRM4451 RRH Product Description and Installation Guide 6-1
6 Installing the iRM4451
This section provides the procedure for installing the iRM4451 RRH in remote
locations such as on towers, poles, masts, walls, roofs, or other structures utilizing a
universal mounting assembly.
Instructions for making connections to external interfaces, cabling, grounding and
power are also provided.
6.1 Assembling cables
The operator will need to order, pre-assemble, and pre-install various cables to the
iRM4451.
6.1.1 Verify Operator-supplied –48 V dc power cable
The Operator supplies and pre-assembles the –48 V dc power connection cable. We
recommend using a 8 AWG minimum, round, 2-wire with ground, shielded cable rated
at 600 V minimum. The female plug (Tyco TE CPC Series PN 78818801), for assembly
of the dc power cable, is also ordered by the Operator. The connection configuration
for the supply side of the power cable is determined by site specific requirements.
6.1.2 Verify Operator-supplied GigE optical cable
The GigE optical fronthaul cable is a custom cable sourced from Huber + Suhner. The Operator
is responsible for ordering this cable in the appropriate length according to site requirements.
The
GigE 2× LC Huber + Suhner Q-XCO fiber optic cable (PN 09H02FG0-50-XA/88-2-L-NN;
where NN=length in meters) is a fiber-to-the-antenna (FTTA), Q-XC0 feeder to LC duplex, 5.5
mm in diameter.
A cable gland is integrated as part of the GigE optical fronthaul cable and seals the
SFP optical connectors inside the bulkhead of the iRM4451 to conform to an IP65
standard, completing the weatherproof seal.
The cable gland screws directly into the fronthaul port on the bottom of the iRM4451.
A gasket seals the cable gland at the fronthaul port. The sealing nut is then hand-
tightened to complete the weatherproof seal.
6.1.3 Verify Operator-supplied grounding cable
The grounding cable and ground bonding hardware is supplied by the Operator. The
operator pre-assembles the grounding cable prior to routing to the iRM4451 .
However, the grounding terminal lug is supplied with the iRM4451 .
NOTE
The grounding cable to the iRM4451 should be 3.9 in (10 cm) longer
than other cables to the unit. This will maintain ground connection
should the cables be pulled off when the unit is extended beyond the
length of the cables.