Installation Instructions

Section 5876 Installation Instructions
Issue AT, April 26, 2013 Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B)
Page 4-4 Chapter 4. Making Electrical Connections
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Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
MCA NETWORK INTERCONNECTIONS BETWEEN BAYS
An MCA Network cable must be installed between all bays comprising the system, as
detailed in the following procedure.
It is recommended to place the Primary Power/Distribution or Power Only Bay on the far
right or far left end of the bay line-up, and to expand the system to the left or right of the
Primary Power/Distribution or Power Only Bay. This allows simple cable connections
between bays, and a consistent MCA Bay numbering scheme. The Primary
Power/Distribution or Power Only Bay is identified by the MCA as Bay #1. The other
bays are numbered consecutively, following the bay-to-bay cabling scheme. Thus, bays
are numbered #1-#10 from right to left or from left to right. For this configuration, use the
MCA Network cables factory furnished with each Secondary Power/Distribution or Power
Only Bay.
The Primary Power/Distribution or Power Only Bay may be placed in the middle of the
bay line-up, expanding the system to the left and right of the Primary Power/Distribution
or Power Only Bay. In this configuration, bay-to-bay cabling MUST start with the Primary
Power/Distribution or Power Only Bay, then each Secondary Power/Distribution or Power
Only Bay and Distribution Only Bay is daisy-chained into the cabling string. Remember,
the Primary Power/Distribution or Power Only Bay is identified by the MCA as Bay #1, the
other bays are numbered consecutively following the bay-to-bay cabling scheme. This
configuration requires some of the MCA Network cables to be a different length then the
standard length cable factory furnished with each Secondary Power/Distribution and
Power Only Bay and Distribution Only Bay. These cables should have been specified
when the system was ordered. Refer to System Application Guide SAG582140000 for
available MCA Network cable lengths and part numbers. The SAG can be accessed via
the CD (Electronic Documentation Package) furnished with your system.
Procedure
Note: Refer to Figure 4-1 as this procedure is performed.
1) Open all bays' front doors.
2) Connect a furnished MCA Network cable (this is a yellow cable) between each
bay as follows.
a) Connect one end of the cable to the MCA circuit card installed in the Primary
Power/Distribution or Power Only Bay. Note that there are two connectors;
one if the next bay to be connected is on the left, the other if the next bay is
on the right. Note also that the MCA (Primary Power/Distribution or Power
Only Bay) circuit card MUST NOT have both of its RJ45 jacks occupied.
b) Route the cable through the opening provided in the side of the bay into the
next bay. If PDSCs (AC Input 'Power Distribution Service Cabinets') are
provided, route the cable through the metal channel provided in the PDSC
and into the next bay.
c) Connect the other end of the cable to the Router circuit card installed in the
Secondary Power/Distribution or Power Only Bay or Distribution Only Bay.
In a Distribution Only Bay, install the supplied ferrite cable clamp onto the
cable near the connector on the router circuit card.
d) Daisy-chain all Secondary Power/Distribution or Power Only Bays and
Distribution Only Bays together in this fashion. The total length of the
network interconnecting the bays cannot exceed 125 feet. Note that if there
are bays on both the right and left of the Primary Power/Distribution or Power
Only Bay, once all bays on one side are connected, you have to take a cable
from the last bay connected on that side to a bay on the other side of the bay