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3-9
Cisco ONS 15200 Product Description
78-13766-01
Chapter 3 Product Hardware
Power and Grounding
Figure 3-7 ONS 15201 SCU and ONS 15252 MCU grounding
3.3.1 ONS 15252 MCU Power and Grounding
Two power supply connectors are located on the backplane of the ONS 15252 MCU. The far-right power
connector (as viewed from the rear of the ONS 15252 MCU) is called PS-1 (power supply one), and the
far-left power connector is called PS 2 (power supply two), as shown in Figure 3-7. The equivalent PS-1
and PS-2 power supply connector terminals are designated 0V and -48V. Grounding for the ONS 15252
MCU chassis is provided by two lug-type grounding connectors (Figure 3-7).
Note To prevent ground loops, use only one grounding connector.
ONS 15201
ONS 15252
LEGEND
ONS - Optical network system
PS-1 - Power supply one
PS-2 - Power supply two
54640
PS-1
PS-2
PS-1
PS-2
(LOCATED UNDER
FRONT COVER)