Phoenix Contact 2963983 A safety relay designed for two-hand control devices meets the ISO 13851 Type IIIC standard and is equivalent to SIL 3 or Cat 4, PL e in accordance with EN ISO 13849, requiring monitoring activation within less than 0.5 seconds, featuring dual N/O contacts and a single N/C contact, providing safe isolation, with a terminal block width of 22.5mm that can be easily plugged into place using a push-in connection.