Ohio Revised Code Title XXIX. Crimes Procedure § 2945.33

When a cause is finally submitted the jurors must be kept together in a convenient place under the charge of an officer until they agree upon a verdict, or are discharged by the court. The court, except in cases where the offense charged may be punishable by death, may permit the jurors to separate during the adjournment of court overnight, under proper cautions, or under supervision of an officer. Such officer shall not permit a communication to be made to them, nor make any himself except to ask if they have agreed upon a verdict, unless he does so by order of the court. Such officer shall not communicate to any person, before the verdict is delivered, any matter in relation to their deliberation. Upon the trial of any prosecution for misdemeanor, the court may permit the jury to separate during their deliberation, or upon adjournment of the court overnight.

In cases where the offense charged may be punished by death, after the case is finally submitted to the jury, the jurors shall be kept in charge of the proper officer and proper arrangements for their care and maintenance shall be made as under section 2945.31 of the Revised Code.