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MESA 6I25 is a low cost, general purpose, FPGA based programmable I/O
card for the PCIE bus. The 6I25 is a low profile one lane PCIE 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-Express
interface. Unlike the parallel port that the 6I25 replaces, each I/O
bit has individually programmable direction and function. The 6I25
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 6I25 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 functions.
are currently six 6I25 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
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 6I25 supports two breakout cards so for example a 10 Axis step/dir
configuration or 12 axis analog servo configuration is possible with a
single 6I25 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
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