What it is and where it fits
The Siemens 3RK1405-1KC02-0BA2 is an AS-Interface Safety at work PCB module, standard IP00, configured as an F-2DI STOP. This is a safety-oriented input module for AS-Interface networks, designed to integrate into a control cabinet or enclosure where the IP00 rating means it requires a clean, dry environment — no washdown, no dust. It connects two safety-related digital inputs (F-2DI) for stop circuits, typically used on safety gates, light curtains, or emergency-stop chains in automated lines.
What the ratings mean for fit
The IP00 rating is the key constraint: it offers no ingress protection, so the module must be mounted inside a sealed enclosure or control panel. The F-2DI STOP designation tells you it provides two fail-safe digital inputs for stop functions, which is the core of its safety role. On an AS-Interface Safety at work network, this module communicates safety status back to the safety monitor, allowing the system to achieve up to SIL 3 or PL e depending on the overall architecture. The PCB form factor means it mounts directly to a backplane or DIN rail via an adapter, not as a standalone field device.