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MESA 5i25 is a low cost, general purpose, FPGA based programmable I/O
card for the PCI bus. The 5i25 is a low profile PCI card (available
with low profile and standard brackets, low profile bracket shown here)
that uses standard parallel port pinouts and connectors for compatibility
with most parallel port interfaced motion control / CNC breakout cards/
multi axis step motor drives, allowing a motion control performance
boost while retaining a reliable real time PCI interface. Unlike the
parallel port that the 5I25 replaces, each I/O bit has individually
programmable direction and function. The 5i25 is a universal PCI card
so will work in 5V and 3.3V systems. the 5I25 provides 34 I/O bits (17
per connector) All I/O bits are 5V tolerant and have pullup resistors. A
power source option allows the 5i25 to supply 5V power to breakout
boards if desired. This 5V power is protected by a PTC. Firmware modules
are provided for hardware step generation, quadrature encoder counting,
PWM generation, digital I/O, Smart Serial remote I/O, BISS, SSI, SPI,
UART interfaces and more. Configurations are available that are
compatible with common breakout cards and multi axis step motor drives
like the Gecko G540. All motion control firmware is open source and
easily modified to support new functions or different mixes of
are currently six 5i25 compatible breakout cards available from Mesa,
the 7i74 through 7i78 and 7i85. The 7i76 is a step/dir oriented breakout
with 5 axis of buffered step/dir outputs, one spindle encoder input,
one isolated 0-10V analog spindle speed plus isolated direction and
enable outputs, one RS-422 expansion port, 32 isolated 5-32V inputs and
16 isolated 5-32V 300 mA outputs. The 7I77 is a analog servo interface
with 6 encoder inputs, 6 analog +-10V outputs, one RS-422 expansion
port, 32 isolated 5-32V inputs, and 16 isolated 5-32V 300 mA outputs.
The 5I25 supports two breakout cards so for example a 10 Axis step/dir
configuration or 12 axis analog servo configuration is possible with a
single 5i25 and two Mesa breakout cards.
information: To correctly use the 5i25 or 6i25 cards, a firmware must
be flashed into the EEPROM. Please read the manufacturer manual for
A wiki was developed to help new users to create a basic set up using a 5i25 with a 7i77 using a single axis with a Argon servo drive. A complete wiki was developed http://wiki.eusurplus.com. The basic linuxcnc configuration can be downloaded here http://wiki.eusurplus.com/downloads/machinebuild_sample.zip
card could be sent with low or standard profile metal bracket. Please,
if this is required, specify which one is needed on the order comments
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