Eaton 105U-3-5W Installation Manual

105U-3-5W wireless extension I/O 

installation guide

Figure 1. Antenna Installation

Earth Stake

Stress 

Relief

Loop

Mast

105U-3

Coaxial Cable

Antenna*

GND

Surge Arrestor

(optional)

Provide good ground

connection to mast, 

module, and surge 

arrestor.  

If ground conditions 

are poor, use more 

than one stake.

1 Wavelength

(minimum) 

Wavelengths:

360 MHz = 32.7" (83 cm)

512 MHz = 22.8" (58 cm)

Weatherproof

Connections 

(recommended: 

3M

™

 23 self-

bonding tape) 

For maximum

range, install 

above local 

obstructions.

Earth Conductor

at least 5 AWG

(16 mm

2

)

*

GND

at least 11 AWG (4 mm

2

)

ELPRO 

105U-3 Multi I/O

CAUTION

For continued protection against risk 

of fire, replace the module fuse only 

with the same type and rating.

Statutory requirements

EC: Unlicensed operation limits the 

radio power. High gain aerials may 

only be used to compensate for 

cable losses.

Antenna installation

Use Figure 1 as a guide for 

installing an antenna and attaching 

it to the module. 

Instruction Leaflet 

IL032006EN

Effective December 2015

Version 2.0