Instruction manual

Instruction Manual
760006-A
September 2001
1-16 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 Platform
Analyzer Module
Power Supply
Fan Board
Controller Board
Enclosure
Operator
Interface
Distribution
Assembly
I/OMODULE
Output
Connector
I/O Module
Extractor
I/O MODULE CONNECTION
(Back View)
I/O Modules
Power Input
Module
1-10 I/O MODULE
a. Overview
The I/O Modules are plugged into the Back-
plane of the Platform. Up to five I/O Mod-
ules can be installed into the Backplane of
the Platform as shown in Figure 1-10 and
Figure 1-11.
Each I/O Module contains a NEURON
CHIP microprocessor which acts as a Node
on the Local Operating Network (LON). The
NEURON CHIP also controls the functions
of the I/O Module in accordance with the in-
stalled software on the I/O Module. These
functions can be modified via the Operator
Interface of the Platform. The SIO and DIO
boards are controlled by menus contained
within the Platform Controller board menus.
The I/O Modules can provide a variety of
digital and analog inputs and outputs via the
connectors located on the rear panel of the
I/O Module. A typical I/O Module Rear
Panel is shown in Figure 1-10 under the ar-
row on the right side of the figure.
Figure 1-12 provides the I/O Module com-
ponent locations and mounting dimensions.
The available input and output functions in-
clude voltage outputs (0 to +5 VDC), current
outputs (0 to 20 mA and 4 to 20 mA),
alarms (3), auto calibration, remote range
change and identification and gateway
translations such as the Modbus protocol.
Figure 1-9 provides the I/O Module back-
plane (not the external!) connector pin as-
signments. This data is provided for oem
user reference only and is not required in-
formation for normal customer use. This
information is NOT the user interconnect
diagram. See Section 1-10b for user con-
nection information
.
Figure 1-10. I/O Modules Location In Platform (Instrument Configuration)