8501X NEMA machine tool relays combine a rugged heavy duty design with modular construction for greater flexiblity.RS miniature plug in relays are designed control circuit logic applications. They are ideal for applications where long life, high reliablity and ease of maintence are important. The 8501X relay family offers a complete line of relays and accessories for most control applications. The relays feature straight through wiringwhich make wiring easier. Plug in contact cartridges makes contact conversion or replacement very easy. Contact conversion or replacement can be done without removing any wiring. The replaceable coils are available in a wide variety of voltages. 8501X NEMA machine tool relays are UL Listed and CSA Certified.