The Delcon Series solid-state relays rely on a patented pulse transformer technology that allegedly offers numerous advantages over electromechanical relays and solid-state opto-couplers. Reported advantages include high transient immunity and high input-to-output isolation, both with no minimum load requirements. The components are tailored for difficult industrial applications that frequently include electrical drives and are available in a range of input and output versions for both ac and dc voltages. Additionally, the pulse transformer technology, in combination with protected circuits, enables a long life cycle of reliability and dependability regardless of the number of operations and switching frequencies. WEIDMULLER INTERCONNECTIONS INC., Richmond, VA. (800) 849-9343.