Cisco ONS 15200 Series, Инструкция по установке, настройке и эксплуатации

Страница: 30 / 136

3-4
Cisco ONS 15200 Installation, Setup, and Test Manual
78-13765-01
Chapter 3 Installation
•
The MCU is grounded at one of two possible locations on the back of the unit. The MCU should not
be grounded at both locations, which can cause ground currents and electromagnetic interference
(EMI) problems. To ground the MCU, use nuts and locking washers on the M6-threaded ground
studs located at the selected grounding point.
• The fan unit is grounded at one of two possible locations on the back of the unit. To ground the fan
unit, use the pair of grounding pins (M4 screws) located beside each of the power connectors on the
fan-unit back panel. To avoid ground loops, use only one M4 screw.
• The SCU is grounded in the back of the unit, adjacent to the PS-1 power supply connector, on the
two M6-threaded ground studs. Use a nut and a locking washer on one or both of the studs.
Note
A ground strip (P/N 72-2755) 30 cm (11.8 in.) long is supplied with the equipment in the ONS 15252
MCU accessory kit (P/N 53-1678) or the ONS 15201 SCU accessory kit (P/N 53-1679).
The location of the grounding points on the MCU and SCU is shown in Figure 3-2 . The location of the
fan unit grounding points is shown in Figure 3-3 .
Figure 3-2 Ground points on the ONS 15252 MCU and ONS 15201 SCU
ONS 15252
ONS 15201
54844