105U-4 wireless extension I/Oinstallation guideFigure 1. Antenna InstallationEarth stakeStressReliefLoopMast105U-4Coaxial CableAntenna*GNDSurgeArrestor(optional)Provide good groundconnection to mast,module, and surgearrestor.If ground conditionsare poor, use morethan one stake.Wavelengths:360 MHz = 32.7" (83 cm)512 MHz = 22.8" (58 cm)869 MHz = 13.4" (34 cm)WeatherproofConnections(recommended:3M™ 23 self-bonding tape)For maximumrange, installabove localobstructions.Earth Conductorat least 5 AWG(16 mm2)*1 Wavelength(minimum)GNDat least 11 AWG (4 mm2)ELPRO105U-4 Multi I/OCAUTIONFor continued protection against riskof fire, replace the module fuse onlywith the same type and rating.Statutory requirementsEC: Unlicensed operation limits theradio power. High gain aerials mayonly be used to compensate forcable losses.Antenna installationUse Figure 1 as a guide forinstalling an antenna and attachingit to the module.Instruction Leaflet IL032007EN Effective December 2015 Version 2.0