4-40 888-2629-200 10/6/10
WARNING: Disconnect primary power prior to servicing.
Section 4 Theory of Operation
Maxiva ULX COFDM Series
The pins of Sections E through L are arranged in dual vertical rows four pins each. All
eight pins of each section (E through K) are connected together and used for three phase
AC input with the eight pins of section L connected to ground.
The three phase AC delta or wye configurations are shown in Table 4-14 on page 4-36.
If a 208 to 240 volt delta connection is used, connector sections F, H, and K are
connected to L2, L3, and L1 respectively. If a 380 to 415 volt wye connection is used,
connector sections F, H, and K are connected to the 3 phase neutral. The line or neutral
choice is made by connecting jumpers between terminals 1 and 2 for neutral and
between 2 and 3 for line inputs in the following listed IPA and PA backplane
connectors. In the IPA backplane use TB1 through TB6, In the PA backplane use TB3
through TB8, TB10 through TB12, and TB14 through TB16.
Figure 4-16 IPA (driver) or PA Module, Connector I/O Board, Connector J1 Detail
Table 4-17 Three Phase AC Inputs to Connector J1
Phases J1 Sections
Output to
Connector I/O
Board
L1 to L2/N E to F TB1
L2 to L3/N G to H TB2
L3 to L1/N J to K TB3
A
B
C
D
EFGHJKL
RF Input
Connector
24 Pin Section56 Pin Section
123456
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