Instruction manual

Instruction Manual
760006-A
September 2001
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-13
Model NGA 2000 Platform
The Dual Analyzer Enclosure simply provides
space for two Analyzer modules as well as rear
panel power and network connections for both.
The front is a blank panel. Note the following
about the Dual Analyzer Enclosure:
If two Analyzer modules are installed, the net-
work connection between the two Analyzers
must be made
If only one Analyzer module is installed, only
one cable need be connected to the network or
Platform supporting the Analyzer module
If a standard Platform is used in conjunction
with multiple module components, power should
be connected to the Platform's 24 VDC con-
nector on the Power Input Module and the net-
work cable should be connected to the Network
Port (see Figure 1-3).
The Single Analyzer Enclosure provides addi-
tional flexibility in system design. It is a standard
Platform (with room for one Analyzer module)
with no front panel display. It can be ordered
with or without a 5 A Power Supply Module, de-
pending on whether the user can provide
24 VDC power.
The 30 A Bulk Power Supply provides the ad-
ditional 24 VDC energy necessary to power an
entire system (standard Platform, I/O Modules,
and multiple Analyzer modules) where the stan-
dard integral 5A Power Supply Module housed
inside the Platform is not sufficient. The sup-
plemental 30 A Bulk Power Supply is capable of
powering up to 10 NGA 2000 components, but
is limited to 30 Amps (refer to Table 1-1)
WARNING.
OVERHEATING HAZARD
To prevent the 30 A Bulk Power Supply from
overheating ventilation openings on the top,
bottom and rear of the enclosure should not
be blocked.
NOTE
Early multi-module power supplies
were supplied with 5A fuses installed,
these fuses were inadequate for the
HFID (Heated FID) and WNX (Wet NOx)
Analyzer modules. When powering
these modules, 8A fuses are recom-
mended. The internal wiring is ade-
quate for this current, early
supplemental supplies are, however,
limited to 25 A total.