The 3RK1903-3CA00 by Siemens is a specialized ET200S Solution PROFISAFE F-CM fail-safe contact multiplier, designed for the efficient coupling of separate safety circuits in industrial automation environments. This module features four floating contacts, each rated at 2 A DC-13 to 24 V, ensuring reliable switching performance and enhanced safety integration. The 3RK1903-3CA00 is compatible as a plug-on extension for the TM-FCM30 S47-E0, and serves as an extension for PM-DFX1 or PM-DF PROFISAFE systems, offering a compact 30 mm design that supports flexible installation in tight control cabinet spaces. Brand: Siemens – recognized for high-quality and reliable industrial automation components Supports seamless integration with Siemens PROFISAFE architectures, enhancing safety circuit management Designed for rapid installation and minimal downtime, the 3RK1903-3CA00 can be easily plugged onto existing modules