The Allen-Bradley 700-ZBR520AZ1 is a Guardmaster safety relay with five monitored safety circuits and two auxiliary contacts, designed to interlock safety devices such as E-stops and two-hand controls in legacy Allen-Bradley systems. It accepts either 24 V DC or 120 V AC input and is rated for up to 8 A load on its contacts, with LEDs indicating Power, Run, and Input fault status. This Series A model is discontinued by the manufacturer and remains common in older machines for safety interlock and stop circuit applications.
