2T749 700 Series

The 2T749 Series relays are solid-state general purpose time delay relays with electromechanical output contacts, for use wherever a time delay with high accuracy and maintenance-free operation is required. Part of the modular 700 Series, they meet rigid Australian and international specifications for electrically hostile conditions. The timing circuit uses a variable frequency oscillator with a binary counter; timing begins when power is applied, and the output relay operates once the preset time elapses, indicated by a red LED. It resets when input voltage drops for over 40ms; power failures under 20ms do not affect timing.