Scanivalve MPS4264, Hardware And Software Manual

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11
MPS4264
Section 2: Introduction
Electronics
The MPS4264 has seven (7) unique printed circuit boards
including two (2) flexible circuits. Under the cover on
the end of the module is the IO Board (Input-Output)
which supports the power input and communications.
This board has all of the interface electrical connectors
including the Ethernet, power and RS-232 connectors. It
is also where the DC-DC power supply is located. The IO
Board is connected to the processor board via a flexible
circuit. The Processor Board is where the modules memory
and processor reside. This board is located along the
very bottom of the module inside of the lower aluminum
cover. Above the Processor Board is the A/D board which
is connected by a rigid parallel board-to-board connector.
The A/D board is where all 16 A/D converters are located
(one A/D per 4 transducers) as well as all of the multi-
plexing and sensor excitation. The A/D board is connected
to each of the two Sensor board with two flexible circuits
each. Each connection handles a quadrant of 16 channels.
The Sensor board, as discussed earlier has 32 individual
pressure sensors mounted on ceramic bases. The last
circuit board is the valve position sensor board. The single
valve position sensor resides in a machined cavity of the
valve/side plate and optically checks the position of the
valve shuttle. It connects directly to the processor board
using a miniature connector.
Figure 2-3: Electronics exploded view
Pneumatic Inputs
For added convenience and flexibility, all pneumatic inputs
on the MPS4000 series use removable headers. There are
three separate manifolds, two headers for the 64 input
ports and a third manifold for the CAL, REF and Control
Input(s). The purge supply pressure is also applied through
each of the two measurement manifolds. The manifolds
are held on with three captive screws each. Under the
CAL/REF/CTL manifold is an ID plate that will be free when
you remove the manifold. Take care to not lose this plate
or the O-rings that are retained by it.
Figure 2-4: Pneumatic input headers
Power & Ethernet Connections
The MPS4264 has its power and Ethernet connections
located on one end. The power connection also serves as
an external trigger input and a serial connection. LEDs are
positioned in a recessed cavity between the two connec-
tors to indicate power, link and activity. Both the power
and the Ethernet connector are TE Connectivity “Mini IO”
series but are polarized differently to prevent mistakes.
The connectors are latching to prevent any vibration from
loosening the connections.
Figure 2-5: Power & Ethernet connections