User's Manual

FWPP-501-01 Issue 1 • 320000117795 Rev A FlexWave Prism Remote Unit and HDM RF Module Installation Guide
© March 2016 CommScope, Inc. Page 75
Install the Prism Remote Unit
a RoutetheendoftheDCpowercablewiththethreeconductorsthroughtheopencable-gland
connectoronthebottomofthePRU.
b Crimpthethreeconductorstothepowerringterminals.Theterminalblockislabeledasto
whereeachwireshouldbeconnected,asdescribedbelow.
• Inatypical-48Vdcplant,thehighestpotentialisthe0(groundorreturn)lead;you
therefore:
– connectthe0(groundorreturn)leadtothepositive(+)connector(redwire)
– connectthe-48Vdcleadtothenegative(-)connector(blackwire)
– connectthethirdwire,ifprovided,totheEarthGroundterminal.
• Ina+48Vdcplant,thehighestpotentialisthe+48lead;youtherefore:
– connectthe+48leadtothepositive(+)connector(redwire)
– connectthe0potential(groundorreturn)tothenegative(-)connector(blackwire)
– connectthethirdwire,ifprovided,totheEarthGroundterminal.
c UseaPhillipsscrewdrivertotorquetheringterminalsto18in-lbs.
d Usea42MMwrenchtotorquethelargenutoutsidethecableglandto44in-lbs.
5 ConnectthewirestothedesignatedterminalsontheDCPowerSourceDistributionPanel.The
followingconnectionsaretypicallymade:
• Inatypical-48Vdcplant,thehighestpotentialisthe0(groundorreturn)lead;youtherefore:
– connectthe0(groundorreturn)leadtothepositive(+)connector(redwire)
– connectthe-48Vdcleadtothenegative(-)connector(blackwire)
– connectthethirdwire,ifprovided,totheEarthGroundterminal.
• Ina+48Vdcplant,thehighestpotentialisthe+48lead;youtherefore:
– connectthe+48leadtothepositive(+)connector(redwire)
– connectthe0potential(groundorreturn)tothenegative(-)connector(blackwire)
– connectthethirdwire,ifprovided,totheEarthGroundterminal.
6 Dressandsecurethewirestotherackfollowinglocalpractice.Routewiringawayfromsharpedges
andsecureinplacetopreventchaffingandprovidestrainrelief.
NOTE: Route all DC input wiring away from any sharp edges and properly secure it in place to prevent
chafing and to provide strain relief. Lace the wires to the rack frame.