Employer SEP contributions and Traditional IRA deduction on form 1040.

I am the sole Shareholder and employee of S corp. The S corp contributed 25% of my wages towards SEP IRA. Can I contribute towards my Traditional IRA and claim deduction ($5500)  on form 1040? if yes, will it be assumed that I am covered by employer plan and l be subject to  limitations for claiming deduction on my  traditional IRA contribution?