Dc Power - Avaya S8700 Installation Instructions Manual

Plugging in AC power
Once the ground and voltages have been verified to be correct for the installation, connect to AC power.
Before powering up the system, check the AC power in the equipment room using a KS-20599 digital
voltmeter (DVM) (or equivalent). To check AC power:
1
Verify that the voltage meter reads either 90 to 132 VAC or 180 to 264 VAC by measuring the AC
voltage between the hot and neutral sides of the receptacle. Request that a qualified electrician
correct any problems before proceeding to Step 2.
2
Verify that the voltage meter reads 0 VAC by measuring the voltage between the neutral and
ground sides of the receptacle. Request that a qualified electrician correct any problems before
proceeding to Step 3.
3
Set the AC main circuit breakers to OFF when you finish checking the AC power.

DC power

Figure 12, Typical DC power for a G650,
Gateway.
Each G650 Media Gateway can be equipped with a maximum of two 655A power supplies, one is always
provided in slot 0 and a redundant unit can be supplied in slot 15. DC power is supplied, via a DC feed
cable, to one connector on the backplane of the G650 Media Gateway and bussed to each power supply
slot. AC and DC current can be supplied to the 655A power supplies at the same time. When both AC and
DC current are present, the 655A uses AC first and switches to DC without any interruption in service if
the AC current fails.
Each G650 Media Gateway, with either single or redundant power supplies, draws a maximum of 17
amps of DC current.
Before you connect the G650 Media Gateway DC feed cable to the DC power source, check the DC
power source using a KS-20599 digital voltmeter (or equivalent). To check DC power:
1
Verify that the meter reads between -42.5 VDC and -54.2 VDC across the -48 VDC and -48V
Return distribution leads from the DC source.
2
Verify that the meter reads 0V between the -48V Return lead of the DC power source and the
approved ground.
3
If either step 1 or step 2 fails the verification, DO NOT PROCEED with step 4. Request that a
qualified electrician resolve the problem.
4
Connect the DC feed cable for each G650 Media Gateway to the DC power source.
a
b
Installing the Avaya S8700 Media Server with an Avaya G650 Media Gateway
December 2003
Connect the red insulated 10 AWG lead to the -48V Return (positive) source.
Connect the black insulated 10AWG lead to the -48 VDC (negative) source.
on page 82 shows a typical DC power layout for a G650 Media
81