105U-2 wireless extension I/O
installation guide
Figure 1. Antenna Installation
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.
Earth Stake
Stress
Relief
Loop
Mast
105U-2
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)
869 MHz = 13.4" (34 cm)
Earth Conductor
at least
(16 mm
2
)
For maximum
range, install
above local
obstructions.
*
Weatherproof
Connections
(recommended:
3M
™
23 self-
bonding tape)
GND
at least 11 AWG (4 mm
2
)
5 AWG
ELPRO
105U-2 Multi I/O
Instruction Leaflet
IL032003EN
Effective December 2015
Version 2.0
