Table of Contents
Advertisement
Chapter 3
Installation
Figure 3-3
-48 V connector
(secondary)
3.2.4 Power Considerations
The ONS 15252 MCU, ONS 15252 fan unit, and ONS 15201 SCU can be powered with a regular
telecommunication power supply of –48 VDC (and 0 VDC return). AC powering can be made from the
regular power grid, at both 115 VAC and 230 VAC, through the use of AC-to-DC power converters. Two
independent power supplies can be attached to the ONS 15200 equipment. If two different supplies are
used, they should be independently powered.
Do not use the AC cord that can be ordered for the SCU in cable management devices such as wiring
Caution
ducts, plenums, or risers. For such applications, you must provide an approved AC power cord. At
minimum, the AC power cord must meet all National Electrical Code (NFPA 70, National Electrical
Code, 2000 Edition) standards and all local building code requirements. This applies to Central
Offices and other buildings.
3.2.5 Shelf Version Considerations
Two versions of the ONS 15252 MCU mechanical shelf exist: Release 1.0 and Release 1.0.1. Cisco
currently ships only the Release 1.0.1 shelf and no longer ships the Release 1.0 shelf.
The Release 1.0.1 shelf includes a baffle. The baffle is a partially-perforated, angled metal plate that is
mounted below and behind the metal support beam, and is mechanically attached to the back of the shelf.
It runs the width of the shelf. To view the baffle, look up through the ventilation cavities at the back of
the shelf.
The ONS 15252 Release 1.0.1 includes a fan unit. Before using the Release 1.0.1 shelf, you must install
the fan unit. Do not use the fan unit with a Release 1.0 shelf. See the Cisco ONS 15200 Product
Description for more information about the fan unit.
Caution
You must install the fan unit in a Release 1.0.1 shelf. Cisco does not recommend or support running
the Release 1.0.1 shelf without the fan unit. Equipment damage may occur.
Do not install the fan unit in a Release 1.0 shelf. Cisco does not recommend or support running the
Caution
Release 1.0 shelf with a fan unit. Equipment damage may occur.
78-13765-01
Ground points on the ONS 15252 fan unit
Ground screws
Cisco ONS 15200 Installation, Setup, and Test Manual
- 48 V connector
(primary)
3-5
Advertisement
Table of Contents
