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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
fan unit grounding points is shown in
Figure 3-2
Cisco ONS 15200 Installation, Setup, and Test Manual
3-4
Ground points on the ONS 15252 MCU and ONS 15201 SCU
ONS 15201
Figure
3-3.
Chapter 3
Installation
Figure
3-2. The location of the
ONS 15252
78-13765-01
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