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6-ch daughtercard offers six ±10V analogue outputs

Posted: 09 Sep 2010     Print Version  Bookmark and Share

Keywords:channel resolver  daughtercard  FPGA based interface cards 

Mesa Electronics introduces the 7I49, a daughtercard for Mesa's Anything I/O series of FPGA based interface cards. The 7I49 is a six channel resolver interface with six additional ±10V analogue outputs.

7I49 6 channel resolver interface

The 7I49 targets applications that read stand-alone resolvers, as the 7I49 generates the resolver reference excitation. The 7I49 can be used with 1:1 and 1:2 transformation ratio resolvers. The 7I49 has approximately 14bit resolution and 12bit absolute accuracy. The 7I49 FPGA interface module allows velocity and absolute position readout by the host. Data is presented to the host in simple parallel register form.

The 7I49 has selectable excitation frequencies, from 2.5kHz up to 10kHz. Host position register is updated at 256 times the excitation frequency to reduce aliasing when host sampling is not synchronous with the excitation frequency. Velocity resolution is approximately 1rpm.

The 7I49 uses an oversampling A-D followed by a tracking filter. Filter coefficients may be changed to trade off noise versus acceleration tracking ability. All resolver and analogue I/O is via 3.5mm pluggable screw terminal blocks.

The 7I49 requires a single 5V power supply.

Price of the 7I49 is Rs.5,743.61 ($123) for 100 units.

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