... New Standard for Reducing Work in Control Panel Relay Sockets with Push-In Plus technology PYF-PU (Sockets for MY Relays) PTF-PU (Sockets for LY Relays) P2RF-PU (Sockets fo...https://www.ia.omron.com/data_pdf/cat/pyf-pu_p2rf-pu_g2rv-st_g3rv-st_g70v_p7sa-pu_j213-e1_2_1_csm1050148.pdf