The ABB auxiliary contact blocks are used for the operation of auxiliary circuits and control circuits for standard industrial environments. Types of auxiliary contact blocks for front mounting are CA4 1 or 4-pole block with instantaneous N.O., N.C. contacts CC4 1-pole block with N.O. leading contact or N.C. lagging contact, CAT4 2-pole block with instantaneous N.O. + N.C. contacts and A1 / A2 coil terminal connection on front face. Product net weight is 0.055 kg Rated frequency (f) is auxiliary circuit 50 / 60 Hz Rated operational voltage is auxiliary circuit 690 V