3-9
Cisco ONS 15200 Product Description
78-13766-01
Chapter3 Product Hardware
Power and Grounding
Figure3-7 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 f ar-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 Figure3-7. 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)