14
MPS4264
Section 3: Operation
Warm-up
Because of the design of the MPS4264, the accuracy is only
minimally impacted by the device warming up after initially
being powered. Figure 3-4 below shows a sample 5psi
module being powered on. Pressures from 3 channels are
shown along with the module temperature. As indicated
in the graph, the first 15 minutes of warm up produces
the only noticeable change in the pressure readings. The
module can take up to 3 hours to fully warm up (in a 25°C
ambient environment) but throughout that warm-up the
pressure readings are very good. It is recommended that
the module be allowed to warm up for a 15-30 minutes
before collecting data, but this is not mandatory. If time
allows, the warm-up period should be extended to 60
minutes for most applications.
Figure 3-4: Temperature & Pressure Through
Module Warm-up
Communications
The MPS module is designed primarily for Ethernet
communications. This provides a means to configure the
MPS module as well as scan and collect data from the
module.
A serial RS-232 connection is also supported. The serial
connection is designed to provide emergency commu-
nications with the module in cases where an Ethernet
connection cannot be established. If the internal memory
in the MPS is corrupted in any way, the serial connection
allows the user to format the memory and restore the
operating files.
Serial Communications
Every MPS4264 module has an RS-232 serial output. It is
available through power connector on pins 1, 2 and 3. The
wiring diagrams can be found in “Appendix F - Cable Draw-
ings and Pinouts” on page 88. Settings for establishing a
serial connection to the MPS4264 module are as follows:
Bits per second: 9600 BAUD
Data bits: 8
Parity: none
Stop bits: 1
Flow control: none
Once a connection is established any of the commands
listed in “Section 5: Software” on page 33 can be sent to
the module. The only limitation is that the a SCAN cannot
be initiated via the serial connection and scan data will
never be returned via the serial connection. Most impor-
tantly, through the serial connection, the module’s “Group
IP” settings, including the IP address, can be viewed and
set. The module’s internal memory can also be formatted
and restored through a serial connection (see “Formatting
the Flash Disk” on page 78 for this procedure.)
Two power/serial cables are available for the MPS. They
are:
P/N 156085: “Premium” Mini I/O male to Mini I/O male
power/serial/trigger cable
P/N 155625: Mini I/O Trigger/Power cable with flying
leads
The cable listed as “Premium” versions use a highly-flexible,
silicone coated cable that is the smallest possible diameter
(0.156”, 4mm).
Ethernet Communications
The MPS4264 has one Ethernet connection, 10/100Base-T
with MDIX auto-crossing. This is the primary means of
communications with the MPS. All MPS4264 modules
use a TE Connectivity “Mini I/O” series connector for
the Ethernet connection. This is a latching connector to
prevent the connector from becoming unseated when
subjected to vibrations. Shielded Category 5e cable or
better is recommended for all Ethernet connections.
Several variations of Ethernet cables using the TE Connec-
tivity “Mini I/O” connector are available from Scanivalve.
Depending on the application, different cables may be
required.
ETHERNET CABLES:
P/N 155635 Mini I/O male to RJ45 male patch cable
P/N 156062: “Premium” Mini I/O male to RJ45 male
patch cable.
P/N 156110: Mini I/O male to RJ45 female receptacle
extender cable.
P/N 156091: “Premium” Mini I/O male to Mini I/O male
patch cable (MPS - ES4000 Switch)
Cables listed as “Premium” versions use a highly-flexible,
silicone coated cable that is the smallest possible diam-
eter (0.156”, 4mm). Maximum cable length for any of the
Ethernet cables is 200 feet. For additional information on
establishing an Ethernet connection with the MPS, see
Summary of Contents for MPS4264
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