Viking's model TDR-1 is a time delay relay device designed to be easily configured to fit a wide variety of applications. The TDR-1 has (2) different modes of operation:
1) In the Time Delay Mode, the TDR-1 can be programmed to produce one of 8 closure times. The Trigger 1 input can be programmed to accept either a dry contact closure or positive/negative going logic level voltage.
2) The Delay on Operate mode delays an input trigger by a programmed interval. Eight delay times are available, from 1 to 30 seconds.