114 Installing the Avaya S8700 Media Server with an Avaya G650 Media Gateway
December 2003
DC Power Distribution Unit J58890CF
NOTE:
The type of power required is shown on the media gateway’s rear door.
Connecting DC power and ground
CAUTION:
Grounding of the MCC1 Media Gateway must comply with the general rules for
grounding contained in Article 250:50 of the National Electrical Code 2002. For more
information, see Approved Grounds
.
The grounding methods for the DC-powered MCC1 Media Gateway are more complex than that of an
AC-powered MCC1 Media Gateway.
Figure 32, Typical power and ground for a DC power cabinet,
on page 115 shows a typical power and
ground layout for a DC power cabinet. The size of the wire required for the -48 VDC and -48 volt return
must ensure the voltage supplied by the battery plant is maintained between -42.5 and -54.2 VDC at all
times for proper operation and to prevent hardware damage. The wire must be sized for a maximum
voltage drop of 0.5 VDC in each leg of the DC distribution.
Perform Global AC Power Distribution Unit J58890CH
on page 95 to connect DC power and ground,
power distribution unit (J58890CH only).
Perform these tasks to connect DC Power and Ground (J58890CF only):
NOTE:
These installation tasks correspond to the numbers in Figure 32, Typical power and
ground for a DC power cabinet, on page 115:
• Connecting grounds for DC battery and power cabinets on page 115
• Connecting DC power cabinet approved ground on page 116
• Connecting AC power to DC power cabinet on page 116
• Connecting ground wires for DC power systems on page 116
• Turning the circuit breakers off on page 117
• Connecting DC power to the media gateways on page 117
• Connecting DC battery cabinet to DC power cabinet on page 117
• If necessary, Connecting mixed AC/DC power and ground on page 122
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