Emerson Micro Motion MVD Direct Connect, Installation Manual

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Installation Manual 7
Product overview and architecture
2 Product overview and architecture
MVD Direct Connect meters are used to supply Micro Motion sensor data directly to a
remote Modbus-capable host, rather than to a Micro Motion transmitter. Because there is
no transmitter component, MVD Direct Connect systems are not intrinsically safe unless
the MVD Direct Connect I.S. barrier is included in the installation.
2.1 Installation options
All MVD Direct Connect systems include a sensor and a core processor. Either the standard
core processor or the enhanced core processor may be installed. The core processor
(standard or enhanced) can be mounted integrally with the sensor or remotely.
If the MVD Direct Connect I.S. barrier is installed, a separate barrier is required for each
core processor.
See
Figure 2-1 and Figure 2-2 for illustrations of MVD Direct Connect installations without
the MVD Direct Connect I.S. barrier. See Figure 2-3 and Figure 2-4 for illustrations of
MVD Direct Connect installations with the MVD Direct Connect I.S. barrier.
Figure 2-1 MVD Direct Connect installations – Integral core processor, no I.S. barrier
WARNING!
MVD Direct Connect systems without the MVD Direct Connect I.S. barrier are not intrinsically
safe.
Core processor
Remote host
User-supplied power cable
User-supplied RS-485 cable
DC power supply
Sensor