What this ASIsafe module does
The Siemens 3RK1205-0BQ00-0AA3 is a K45F compact safety module that puts two fail-safe digital inputs on the AS-Interface network. It accepts mechanical switching contacts — think safety gate switches, emergency-stop pushbuttons, or interlock limit switches — and reports their state over the AS-i bus. The inputs are safety-related (2 F-DI), meaning they can be used in a safety circuit up to SIL 3 / PL e depending on the system architecture. Power and data come from the AS-Interface cable itself: the module draws a maximum of 45 mA from the AS-i total current, operating across the standard AS-i voltage range of 26.5... 31.5 V DC. No separate supply needed.
IP67 and mounting — where it goes
Rated IP67, the module is built for washdown zones and wet environments — food processing, packaging lines, car-body paint shops. The housing is the K45 compact form factor (45 mm wide, 80 mm high, 34 mm deep). Connections are two M12 sockets for the sensor inputs. Front addressing socket lets you set the AS-i address with a standard handheld programmer. The yellow LEDs show input state; the green/red LED indicates AS-Interface communication and diagnostics.
The 3RK1205-0BQ00-0AA3 carries an active lifecycle status from Siemens. It is a current-production catalog item, not a phase-out or NRND part. This is the module you spec into a new line without worrying about last-time-buy windows.