I'll try one more time. I could certainly design a protection circuit that is triggered by a current and/or voltage threshold, and I'm sure many other members of the forum could also do it. But the exact design details will depend on the type of what you call "a digital output", the type of load, frequencies involved, power supply, etc. You said that the limit should be 0.5A at 60V, but you also said that "the input supply will be from 24 to 60v". Does this mean that the power supply is variable?
All those details will determine where and how the overload current can be conveniently sensed, how the circuit can best be switched off, what type of protection circuit will be most suitable, and so on.