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Procedure
1. On the DC PEMs, 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 -48 VDC terminal block and the red wire to the RTN terminal block.
Warning: DC power
•
A 10 AWG cable must be used to connect the mains with the RealPresence
Collaboration Server (RMX) 4000 DC PEM.
•
The supply wires for DC version must be terminated using quick connectors.
•
Extension cords may not be used.
The center PEM slot/module is fitted with a blank panel and the slot cannot be used on a system
with DC Voltage.
5. Connect the green or green-yellow wire to the system single-point M6x15 "Ground" bolt
Warning: Protective earthing conductor
The rating of the protective earthing conductor should be a minimum of 10 AWG.
If the unit is rack mounted, the single-point ground on the MCU must be connected to the rack with
a single conductor and fixed as to prevent loosening. When using bare conductors, they must be
coated with an appropriate antioxidant compound before crimp connections are made. Tinned,
solder-plated or silver plated connectors do not have to be prepared in this manner.
6. Replace the transparent plastic cap on the terminal block.
7. Turn ON the circuit breaker on each of the DC PEMs.
On the RealPresence Collaboration Server (RMX) 4000, two types of circuit breakers can be
installed:
•
ON/OFF circuit breaker-Type A
Polycom, Inc.
Appliance Edition Installation
28
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