Siemens 3RK1405-1KC01-0BA2 AS-Interface Safety Module, F-2DI

The 3RK1405-1KC01-0BA2: The IP00 rating means this is a bare PCB module — no enclosure, no housing. It mounts directly inside a control cabinet, typically on a DIN rail or a mounting plate, and relies on the panel's own IP rating for environmental protection. The F-2DI/1DO LOCK designation tells you it carries two safety-rated inputs (for e-stops, light curtains, or safety mats) and one safety-rated output that latches or locks a downstream contactor or valve until the safety condition resets. That locking output is key: it holds the actuator in the safe state even if the AS-i bus loses communication, which matters for stop-the-line guarding on a body-shop weld line where any unintended restart costs cycle time.