Tenders for Supply of Relay Ac Immune, Plug In Type, Style Qba-1, Dc Biased Line, 24V, 8F/8B Contacts, Front And Back Contacts Metal To Carbon, Complete With Plug Board, Retaining Clip And Connectors Conforming To Brs:932A, Irs:S 60, Irs:S 34 And Irs:S 23Amdt. Upto Date, As Applicable.The Interlocking Code For This Unit Shall Be Acdeh.