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Wirnet iBTS
Document title : Installation and
Maintenance Manual
Version : 2.0
Author : SNI
Date : 04/12/2018
Classification
This document is the strict property of Kerlink and shall not be either copied nor sent without express
written authorization of Kerlink
Internal Use
Kerlink m2m technologies reserved rights
Confidential
Kerlink – 1 rue Jacqueline Auriol – 35235 THORIGNÉ-FOUILLARD
Page 84 / 221
Strict confidential
Note 1:
beware of the operating ambient temperature. Output power derating over +50°C is
critical and has to be carefully considered to insure proper supply of the Wirnet iBTS.
The following figure details the outdoor DC/DC Midspan PoE injector 60W:
Figure 44 : Outdoor 60W DC/DC POE injector
Note 2:
this PoE injector must be connected to an industrial electrical installation including
at least a main board with surge protections type 1.
1.6.2
Auxiliary power supply
The Wirnet iBTS can be also supplied with an auxiliary DC power supply as a solar panel for
instance. The input voltage range is 11 to 56VDC. A 24V DC solar system is then
recommended for optimized performance.
The power supply must be qualified as a limited power source.
The maximum power is 30W.
The nominal current for a 24V power supply is about 1.2A in the following configuration:
HSPA in a network attached mode
4 LoRa LOC modules / all demodulators activated
20% CPU load
A two-wires cable is required to interconnect the auxiliary power supply connector.
The installation of the cable is detailed in §4.6.5.
Specific DC applications where the Wirnet iBTS is in power supply colocation with other
equipments require precautions. In such cases, some equipment may have connection
between earthing system and the power supply connection (either “+” or “-“ wire)
dependent if the application is in +48VDC or -48VDC. As the electrical ground of the Wirnet