will LVTTL drive a RC Servo?

[jphsteele]

Hi,

I am looking at a 9381 multifunction module for cRIO application, but I need it to drive two RC servo motors.  Does anyone have any experience with this?  Typical RC servo specs say 3-5 V for control signal. 9381 says the module provides LVTTL digital signal.

Thanks!

[crossrulz]

Digging into the specification, I would say that you will need a buffer.  The spec says that it will put out 2.7V @ 100uV.  Do a search on Digikey for a digital logic buffer that can handle the current you need.  You might also want to get a buffer that can take the 3.3V as an input and output 5V.

[Emily-C]

Hi jphsteele,

Are you using brushed  or brushless servo motors? We do make servo drive cRIO modules. The NI 9505 is a Full H-Bridge Brushed DC Servo Drive Module, and the NI 9502 is a Brushless Servo Drive Module. Both of these modules also require a power supply connection to provide enough current to the motors.

Regards,