Installation Guide
Table Of Contents
- Preface
- Contents
- 1 Introduction
- 2 Safety requirements
- 3 Physical description
- 4 Installation prerequisites
- 6 Installing the iRM4451
- 6.1 Assembling cables
- 6.2 Routing pre-assembled power/GigE optical fronthaul/grounding cables
- 6.3 Installing the iRM4451 mounting bracket
- 6.4 Hoisting the iRM4451 on elevated structures
- 6.5 Installing the iRM4451 on the mounting bracket
- 6.6 Connecting the grounding cable
- 6.1 Connecting the RET cables
- 6.1 Connecting the GigE optical fronthaul cables
- 6.1 Connecting the –48 V dc power cable
- 6.2 Checking power
- 6.3 Installing the solar shield
- 7 Terms, Acronyms and Abbreviations
- 5 iRM4451 installation overview
Physical description
3-6 iRM4451 RRH Product Description and Installation Guide
GPS cables are provided and pre-installed by the Operator. The GPS cable bend
radius is ≤0.75 in (19 mm).
3.2.2 RF connectors
There are four 50-Ω, 7/16 RF jacks (M29x1.5 threaded couplings) that terminate
on the bottom of the iRM4451. They are marked ANT 1 through ANT 4.The RF
cables are supplied and pre-installed by the Operator.
The RF 7/16 connectors are secured by torquing the M29 sc
rew ferrule 15–20 in-lb
(20
–28 Nm) using a torque wrench.
NOTE
The Operator is responsible for determining the antenna type, and supplying
and pre-installing the antennas at the site.
3.2.3 Power connector
–48V dc power to the iRM4451 is through a 3-pin circular twist-lock power
connector, Tyco TE CPC Series 5 (788189-1). The connector is keyed to prevent
mis-mating. The mating plug (TE CPC Series 5 [7963075-1]) is fastened by
turning the coupling nut clockwise until it 'clicks' into the locked position. The
power connector pin assignments, as viewed from the bottom of the iRM4451, are
shown in Figure 3-7.
1 –48V dc
2 RTN
3 NC
Figure 3-7 –48 V dc 3-pin circular power connector
We recommend cable type SOOW, 8 AWG (min.), 2-conductor, stranded copper
wires, indoor/outdoor, round cable, rated at 600 V, or equivalent.
3.2.4 RET connector
The RET (Remote Electrical Tilt) connector provides the capability of electrical
antenna control to all antennas connected to the iRM4451. Pin assignments for the
RET 8-pin DIN connector is shown in Figure 3-8. The connector is keyed to
prevent mis-mating. The connector is f
astened by turning the coupling nut
clockwise until hand tight.