Polycom RMX 4000 Hardware Guide
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Connecting the RMX 4000 to -48DC SELV Power
1 On the DC Power Rail Modules (PRM’s), set the two circuit breakers
to OFF.
2 Ensure that the cables from the Main that supplies electricity to the
DC power units are OFF or disconnected.
3 Remove the transparent plastic caps on the terminal block.
4 Using the two wires of an 10 AWG cable running from the DC power
distribution unit, connect the black wire into the -48V IN terminal
block and the red wire to the -48V RTN terminal block.
• A 10 AWG cable must be used to connect the mains with the RMX 4000 DC
Power Rail Module.
• The supply wires for DC version must be terminated using quick
connectors.
• Extension cords may not be used.
ESD connector
Circuit
breaker
-48V IN
+48V RTN
Ground connector
Blank panel
The center PEM slot/module is fitted with a blank panel and the slot cannot be
used on a system with DC Voltage.
