Installation Guide

11
2.4.2 Environmental Requirements
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Table 2-2 Environmental Requirements
Item
Range
Typical value
Temperature
-40°C to 55°C
25°C
Relative humidity
(no condensation)
0% to 100%
5% to 95%
Safety voltage (DC)
-40VDC to -57VDC
-48VDC
Lightening & Grounding Protection
2.5
You must protect the gNB, antenna, and GPS against lightning. Following are guidelines
concerning grounding.
 The yellow-green ground wire must be at least 10mm
2
in diameter.
 In principle, always place the grounding as near as possible to the equipment.
 Connect to a reliable outdoor grounding point (earth) using one ground screw.
 The connection of the grounding points and ground bar need to be tight and reliable.
Rustproofing the terminals, e.g., with anti-oxidant coating or grease, is required.
Weatherproofing 2.6
To protect the connection points from weather and climate, clean each connection point
before installing cold shrink tubes, per the following (Figure 2-1).
1. Insert the cable into the cold shrink tube.
2. Tighten the connector.
3. Push the cold shrink tube to the top joint, and pull out the strip.
4. Ensure the cold shrink tube is tightly fitted with the connection.
Figure 2-1 Weatherproofing