14. NW64900 Data Acquisition System
14.1 General
This data acquisition system (DAQ) aims to provide a flexible, scalable and universal platform to
interface analogue, digital or serial sensors to the VDR.
The architecture allows for a single wire Ethernet (which includes PoE, power over Ethernet) to
connect to the CM (core module).
Within the DAQ various modules provide input ports for analogue, digital and serial signals to be
recorded by the VDR. Up to 8 additional DIN-rail mounted DAQ modules may be mounted for
each Buscoupler.
The DAQ system relies on the ‘busbar’ integrated within the DIN rail, serving the function of power
and data distribution.
Within the DAQ, the so called ‘WaveNet Buscoupler’ plays a vital role since it has multiple
functions:
Function 1: to convert PoE to supply power suitable to the various (input) modules to be placed
on the DIN busbar integrated within the (DIN)rails.
Function 2: to concentrate the data coming from the input ports of the various modules and to
communicate to the CM (core module) in compliance with the IEC61162-450 LWE (light weight
ethernet) specification.
Function 3: to act (optionally) as a data concentrator/repeater, providing accumulated data in a
universal serial (NMEA) output-form to serve other devices beyond the VDR.
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