Using USB-6525 solid-state relay module to control 25VDC solenoid valves, are flyback diodes necessary?

[BuddyE]

We will be using USB-6525 to drive solenoid valves.  The solenoid valves operate at 24VDC at 300 milliAmps.

Do I need to add flyback diodes between the solenoid valves and the USB-6525 to protect against flyback currents?

thank you,

Buddy Ehrlich

sehrlich@cytonomest.com

[AnalogKid2DigitalMan]

Yes, and actually the diodes are in parallel with the valves. 1N400x series are typically used.

Refer to pages 11 and 12 of the manual:

http://www.ni.com/pdf/manuals/371818b.pdf

-AK2DM