The TBC On-Delay DIP Switch TDR time delay from the ATC Diversified Electronics division of Marsh Bellofram Corporation begins when supply voltage is applied to the input. Upon completion of the delay period, the relay energizes. Reset during or after the delay period is accomplished by removal of the supply voltage. The TBC Series will not false transfer if supply voltage is removed prior to completion of the delay period. A fast recycle time permits accurate, high speed, continuous operation.