Mesa StepGen ouputs with Yaskawa servos

Hi,

I would like to drive my Yaskawa servos with step/dir differential outputs from a 7i96, and found this in the servo's manual:



Does that mean that the differential output voltage should be 3.3V instead of the 5V from the 7i96?

the servopack shout accept the 5V as it is standard the SN is only for controls that work on 24V signaling

please give the correct yaskawa drive number to confirm the input

With the input circuitry shown, the Opto LED current will be roughly 12 to 18 mA.
adding a ~120 ohm series resistor will get you in the middle of that range with 5V drive.
(and 75 to 180 ohms should work)

It's a SGD7S servopack.

Thanks PCW. Too bad an extra resistor is needed.

PCW wrote: With the input circuitry shown, the Opto LED current will be roughly 12 to 18 mA.
adding a ~120 ohm series resistor will get you in the middle of that range with 5V drive.
(and 75 to 180 ohms should work)

Does this also apply to the 7i85S differential outputs? It looks like it uses different drivers.

Yes, all Mesa daughter card step/dir differential outputs have 5V swings