The Siemens 3RK1207-2BQ44-0AA3 is an AS-Interface compact module K60, specifically an analog slave with 4 analog inputs for voltage measurement. It accepts 2-, 3-, or 4-conductor sensors and provides a 16-bit A/D conversion, configurable for ±10 V or 1-5 V ranges. The module is designed for field deployment with an IP67 rating, meaning the housing and M12 screw-type terminals withstand washdown environments and dust ingress on the factory floor.
The 16-bit resolution per channel gives you 65,536 counts across the selected span — adequate for most process signals where you need better than 0.1% of span repeatability. The adjustable measuring range (±10 V or 1-5 V) covers common industrial voltage outputs from pressure transmitters, flow meters, and linear position sensors. The module draws up to 160 mA from the AS-Interface bus at 30 V, plus up to 500 mA from the auxiliary supply (Uaux) when powering external sensors. Without auxiliary supply, the module itself consumes 46 mA. That 500 mA auxiliary budget is the limit for all four sensor loops combined — watch your sensor current draw when populating all four channels.
The K60 form factor measures 60 mm wide, 152 mm high, and 29 mm deep — it snaps onto standard DIN rail or mounts to a wall using the separate mounting plate (3RK1901-0CA00, ordered separately). The IP67 rating means you can locate this module directly on a machine frame or conveyor line, not just inside a sealed cabinet. The M12 connectors (4-pin, screw-type) are the standard fieldbus sensor connection; you'll need mating cordsets with the appropriate pinout for 4-wire voltage sensors. The AS-Interface bus supplies both communication and power through the yellow flat cable, while the auxiliary voltage (24-30 VDC) comes through a separate M12 connection for sensor power.