Media Technology Systems AMX 0.2 - Manual (Page 11)

Page%11%of%39% May-10
%
3.3.3 Ground&pin&
The!AMX0.2CN!has!a!rear!PCB!mounted!ground!pin!–!see!Figure 3-5!below.!Ideally,!STP!
cable!should!be!used,!where!the!shield!is!connected!to!a!good!ground!at!the!PoE!switch,!
but!it!is!accepted!that!UTP!will!be!used!in!most!situations.!!The!rear!PCB!ground!pin!has!
been!provided!as!a!means!of!connecting!the!interface!to!a!good!ground!when!used!with!
UTP!cable.!!
!
The!ground!pin!should!be!connected!to!the!metal!rear!enclosure!of!the!AMX0.2CN!and!
in!turn,!the!metal!rear!enclosure!should!be!connected!to!either!technical!ground!
(preferable),!common!safety!ground!(next!best),!or!building!ground!(worst!case).!
!
Please!note:!ALL!grounds!should!comply!with!local!safety!codes!and!usually!have!a!
common!connection!at!the!building!entrance.!
Figure 3-5: Ground Pin on rear PCB of AMX0.2CN
Warning:! The!AMX0.2CN!is!designed!with!consideration!of!real!world!conditions!
where!it!is!possible!that!external!devices,!such!as!mixers,!power!amplifiers!and!other!
A/C!powered!devices!can,!through!cabling!defects!and!anomalies,!connect!potentially!
damaging!voltages!to!the!installed!system.!!Should!such!voltages!be!inadvertently!
connected!to!the!AMX0.2CN!device,!we!have!provided!a!fuse!in!the!grounding!circuit!
that!will!‘open’!to!protect!the!rest!of!the!installed!system!from!extensive!damage.!!The!
only!indication!of!this!having!occurred!may!be!increased!noise!from!the!AMX0.2CN.!!
There!are!no!user!serviceable!parts!inside!these!products!so!they!must!be!returned!to!
qualified!service!personnel!or!the!factory!for!repair.!!Please!review!the!warranty!
information!in!this!manual!for!how!to!proceed!should!this!happen.!! !
!