Allen-Bradley 700-PKC40 is a 3rd-level adder deck for the 700-P relay family, delivering a four-pole, 20 A contact-capacity extension. This Rockwell Automation accessory mounts to a 700-P relay to expand its contact set and support four independent circuit paths in industrial control panels. The PKC40 variant is documented as a 4-pole, 20 A add-on deck, with Series E listings showing the PKC40 as a current product. In practice, it is used in industrial control applications where expanding the pole count of a 700-P relay streamlines wiring and increases switching capacity within a compact relay rack.
