Need to control the exact timing of a relay closure in your automation or access control setup? The Viking TDR-1 gives you precise, programmable time delay relay output without complicated programming or specialty tools. The TDR-1 operates in Delay on Operate mode, holding back an input trigger for a set interval before activating its relay output. With 8 selectable delay times ranging from 1 to 30 seconds, you can dial in the exact timing your application requires using simple onboard DIP switches. The single double pole double throw relay output gives you flexible switching options, and the built-in LED relay status indicator lets you confirm operation at a glance during setup or troubleshooting. Trigger input is equally flexible — the TDR-1 accepts a dry contact closure or positive/negative going logic level voltage, making it easy to integrate with a wide range of control systems, sensors, or automation equipment. Screw terminal connections keep wiring clean and straightforward. Our Expert Take: The TDR-1 is a no-fuss solution for installers who need reliable, repeatable time delay control without writing custom logic or sourcing a programmable controller. The DIP switch configuration means you can make changes quickly in the field, and the dual-polarity logic input compatibility removes the guesswork when integrating with third-party equipment. If your application requires monitoring multiple trigger inputs or longer delay windows, verify your timing requirements against the 1–30 second range before specifying this unit. Key Features Delay on Operate mode delays an input trigger by a programmed time interval before activating output 8 selectable delay times from 1 to 30 seconds DIP switch programmable — no software or external programmer required 1 double pole double throw (DPDT) relay output for flexible switching configurations Trigger input accepts dry contact closure or positive/negative going logic level voltage LED relay status indicator for easy visual confirmation during installation and testing Screw terminal connections for clean, reliable wiring Technical Specifications Relay Output: 1 Double Pole Double Throw (DPDT) Delay Times: 8 selectable intervals from 1 to 30 seconds Delay Mode: Delay on Operate Trigger Input: Dry contact closure or positive/negative going logic level voltage Programming: DIP switch Connections: Screw terminals Status Indicator: LED relay status indicator
