Environnement AF22e, Technical Manual, Page: 33 / 118

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AF22e
Environnement
S.A
APRIL 2016
2–13
2.7 ELECTRONIC ARCHITECTURE
Communication between the ARM20 board and the other electronic boards (Measurement board,
Interconnection board, Power supply board, Controller board, Pressure sensor board….) follows the
schematic shown in Figure 2–5
The ARM20 board is a rapid calculation and interfacing (communication) board for the “e” series
measurement modules. It is installed in all analyzers and offers one Ethernet output (RJ45 socket), and
three USB ports (one on the front panel, and two on the rear panel through the Interconnection board).
For these analyzers, the ARM20 board is the central element for electronic and metrological operation,
and outward communication.
The measurement board performs measurement acquisition and operation parameter acquisitions. All
metrological parameters are sent to the ARM20 board through a USB communication protocol.
The power supply board provides internal voltages from the 24 V cut-out power supply to the analyzer,
as follows:
−
+24 V filtered and secured,
−
+12 V, for ARM20 board supplying,
−
+5 V,
−
+3.3 V.
The Controller board performs the main following functions:
−
Provides (+ 24V) various power control for the internal solenoid valve switchings.
−
Allows temperature acquisition and control management of the various internal heating elements.
−
Allows pressure signal acquisition from the various pressure sensor boards.
−
Integrates one USB hub to ensure communications between the various boards.
The Interconnection board allows connections of all the connectors and sensors together.