The 26-year-old continued to applaud the referee after his dismissal and reluctantly left the pitch.
Zaha accepted the charge at an Independent Regulatory Commission hearing on Wednesday.
After serving a one-match ban during Saturday's 2-0 win over Fulham for the red card, Zaha now faces a second game on the sidelines.
"The suspension is not currently effective whilst the player considers his right of appeal," the FA said in a statement.
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Palace host West Ham United in the league on Saturday.
(Reporting by Hardik Vyas in Bengaluru; Editing by Toby Davis)
