The Siemens 3RK3141-1CD10 is a PROFIsafe/ASIsafe F-Link — a safety gateway that bridges a PROFIBUS DP network to an AS-Interface safety at work subnet. It's the part you drop into a control cabinet when you need to consolidate safe digital and analog I/O from an AS-i line into a PROFIBUS safety controller. Rated for safety category 4 per EN 954-1, it handles the highest-risk guarding applications — think press brakes, robot cells, or conveyor zones where a fault must stop the line in under the safe reaction time. At 45 mm wide and 124 mm deep, it fits a standard 4-module slot in a SIRIUS cabinet layout.
What the key specs mean for a panel builder
The 24 V DC supply feeds the gateway and the AS-i bus master; at 24 V with AS-i Power24V, the maximum current draw is 100 mA — light enough that you can daisy-chain power from an existing 24 V rail without a dedicated supply. PROFIBUS DP at its back end, AS-Interface on the field side. The gateway handles up to 31 AS-i slaves with a 5 ms cycle time, or 62 slaves at 10 ms. That makes it a good fit for medium-sized safety islands — not a full factory floor, but a single machine zone. Digital I/O data is mapped directly into the PROFIBUS process image; analog I/O is accessed via data record transfer. No extra memory mapping or function blocks needed on the PLC side — it's a straight drop into a standard safety program. IP20 protection class means it's for the cabinet, not the field. Keep it behind a gland plate or inside an enclosure rated for the environment.