I am working with an industrial PLC, the Beckhoff BX9000, with 24 V digital outputs. I am looking to drive a hobby stepper motor with Polulu's 'A4988 Stepper Motor Driver Carrier', which accepts logic inputs with a max of 5.5 V. Will a simple voltage divider suffice to step down the 24 V clock signal to a 5 V clock signal to be input to the stepper driver? Or will issues occur?
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\$\begingroup\$ The answer is depends. What are the clock requirements? Speed, jitter, voltage ripple etc. What do the various datasheets say? However, you can get dedicated clock voltage translators, so they are probably the best bet. \$\endgroup\$– PuffafishCommented Oct 3, 2018 at 10:56
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\$\begingroup\$ I would bet that there is no problem, providing that you divide enough to have a final voltage of about 4 volt (to leave room for safety...) \$\endgroup\$– linuxfan says Reinstate MonicaCommented Feb 18, 2020 at 18:33
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2 Answers
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Probably not, because the general 24V PLC outputs don't provide pulse train output (PTO). Further the 24V outputs are slow, usually you need a special module that provides PWM, PTO,... on the PLC system.
answered Oct 3, 2018 at 9:35
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Ya why not?
But maybe do other things like having an LDO to make sure that it is only 5V going to the motor and also check the current that the motor takes and if need have a limiter in there as well.
Of course your going to have issues, what they are depends on how you connect the whole thing up.
