Yes, EDS is a Scrabble word!

Letter values in Scrabble US: E 1, D 2, S 1.

Is it a valid word?

EDS is a valid word in the official Scrabble dictionary (US) and the UK Scrabble Dictionary, but not in Words with Friends (ENABLE).

a rapid automatic system to detect plastic explosives in passengers' luggage using X-ray technology and computers; designed for use in airports
impotence resulting from a man's inability to have or maintain an erection of his penis

Also: explosive detection system, erectile dysfunction, male erecticle dysfunction.