Controlling a Solenoid valve using NI 9485

Hi,

I want to use a NI 9485 SSR Module to control four 24 V Solenoid Valves. Do I need to use a Fly-back Diode across the loop to prevent Back Emf?

Will the module be damaged if I don't use a fly-back Diode or does the NI 9485 Module have inbuilt protection against such occurrences from a solenoid ?

I would like to stop using the the fly-back diode if possible since it would remain  exposed to the elements in our application and I would like to avoid that .

Thank You.

Have a Good Day.