Nortel Networks 8010co manual Power and grounding example

Chapter 1 Overview 29

Figure 10 Power and grounding example
	Return Secondary B
	Return Primary B	-DC PS3 Lower
	Return Secondary A	-DC PS2 Lower
	Return Primary A
		-DC PS1 Lower
	+DC PS1 Upper
		-DC PS3 Upper
	+DC PS2 Upper
		-DC PS2 Upper
	+DC PS3 Upper
		-DC PS1 Upper
	+DC PS1 Lower
		-48 VDC Primary A
	+DC PS2 Lower
Equipment		-48 VDC Secondary A
	+DC PS3 Lower
		-48 VDC Primary B
rack
		-48 VDC Secondary B

	3 2 1 3 2 1			3 2 1 3 2 1 A1 A2 B1 B2
	PS (+)	PS (+)	A/B Input Feed	PS (-)	PS (-)	– 48 VDC
	Lower Shelf	Upper Shelf	Returns	Lower Shelf	Upper Shelf A/B Input Feeds
	Power terminal block (BIP)					Chassis
	Upper shelf					ground stud
Rack
grounding strip	PS 1		PS 21		PS 3	Cable not
example
		+ DC	+ DC		+ DC	supplied
		– DC	– DC		– DC
Gnd BIP						Chassis
Gnd PS 1 upper	Lower shelf					ground stud
Gnd PS 2 upper
Gnd PS 3 upper
Gnd upper shelf
Gnd PS 1 lower	PS 1		PS 21		PS 3
Gnd PS 2 lower						Cable not
Gnd PS 3 lower		+ DC	+ DC		+ DC	supplied
Gnd lower shelf		– DC	– DC		– DC

Legend:

= Chassis ground

= Earth ground

PS 3

+ DC	= Redundant equipment
– DC

10760EB

Installing the Breaker Interface Panel for the Ethernet Routing Switch 8010co Chassis