Thank you so much for taking the time to help me. I had a look around and though it's no longer online, I found an archived webpage and PDF using the wayback machine:

https://web.archive.org/web/20200211...mainboard.html
https://web.archive.org/web/20200923...otherboard.pdf

It says that it has a maximum logic input of 5V but doesn't say anything about the output. However, if you look at these specs along with the specs of the associated driver board it says the following MAX values (https://www.tiggyengineering.com/wp-...5ampdriver.pdf) :
Input Voltage 30 Volts DC
· Logic Input :
Step / Direction / Enable Voltage
Logic High Min 2.9 MAX 5 V
Logic Low MAX 1.5 V