Installation Guide

V5 Node B Installation Guide
Version 1.0.5 Page 29 of 44
Step 7 DC Power Connection-Radio Equipment Shelf
The power supply input must be a nominal -48Vdc input, refer to Table 4-1
The connection of the main DC supply is via the cable provided as part of the Radio
Equipment shelf package.
The provided cable assembly has 3 metres of cable with a connector to provide connection
to the Radio Equipment shelf. The tail ends of the cable are stripped and must be terminated
to a permanent connection junction/terminal block. The length of the cable may be
shortened to facilitate installation.
Notes:
 The Main DC supply should be configured with a separate DC return conductor and be
bonded to the common protective earth according to ETSI EN 300 253 v2.1.1 (2002-04)
Clause 6.1
 The Main DC supply to the equipment shall also be protected either by a fuse or circuit
breaker at the connection point of the radio equipment shelf power cable.
 Only the cable provided with the Radio Equipment shelf should be used.
 The connector is keyed to prevent wrong insertion.
 Cable connection voltages 0V and -48V are identified on the stripped ends of the power
cable.
Figure 5-10 : Power Connection to the Radio Equipment shelf