The 440R-ZBR520AZ2 is a discontinued safety relay from ALLEN BRADLEY, featuring MSR18T technology with 24V AC/DC and 230V AC operation. It offers automatic/manual monitored functionality in a fixed 90mm housing width, with a response time of 0.5 seconds. The relay includes one 2 N.C. input and 1 N.O. & 1 N.C. output configuration. Replacement model: 440R-S13R2. Factory warranty does not apply, but includes Beyondtech's warranty.