Safety relays, 4 Form A (N/O) (safety-related instantaneous switching) + 1 Form B (N/C) for feedback loop (instantaneous switching), 24 VAC, 3SK1211-2BB00
Safety Relay Dimensions W x H x D: 22.5 x 100 x 121.6 mm Operating temperature: -25...60 °C Design: Expansion unit Assembly type: Top Hat Rail Mounting Output contact without delay: 4 Make Contacts (NO) Protection rating (housing): IP20 Service life, electric: 0.25 Mil. cycles Service life, mechanical: 10 Mil. cycles Termination type: Spring Clamp Terminals