CAL4-11RT is a 2-pole side mounted auxiliary contact block equipped with screw terminals for connection with ring tongue ferrules and can be fitted on AF09..38(Z)B..RT contactors and NF(Z)B..RT contactor relays. CAL4 auxiliary contact block can be clipped onto the right- and/or left-hand side of the contactors or the contactor relays and bears the corresponding function marking. CAL4-11RT is available with 1 N.O. and 1 N.C. instantaneous contacts for standard industrial environments. Screw terminals for connection with ring tongue ferrules, includes non-detachable screw with conic washer for a fast and secure tightening of cables.