The Siemens 3RK3511-2BA10 is a SIRIUS DP interface module for the 3RK3 modular safety system, handling PROFIBUS DP communication at up to 12 Mbps over RS-485.
This part carries an NRND (Not Recommended for New Designs) status. That means Siemens will continue to support existing installations and fulfill orders for a period, but the design-in window is closed. If you're planning a new safety system, Siemens' current SIRIUS safety portfolio offers the functional replacement; the exact successor order code is not published in this record, so confirm the drop-in with your Siemens channel partner before committing a new panel layout.
The 124 mm depth and 113 mm height define the enclosure clearance — standard 200 mm deep enclosures are fine, but shallow back-panel boxes need a check. The 70 A inrush current peak at 24 V DC lasting 1 ms means the 24 V supply feeding this module needs enough capacitance to handle that transient without dropping out; a typical 2 A SELV supply with a 1000 µF output cap handles it, but a marginal power supply will brown out the safety bus on power-up. IP20 means it's for inside a locked cabinet only — no washdown, no dust ingress protection. The 2 kV burst immunity on power ports per IEC 61000-4-4 is standard for industrial control panels; no special filtering required for most environments. The 15g / 11 ms shock resistance and 5... 500 Hz vibration rating at 0.75 mm confirm it survives on a machine frame or a moving panel section, not just a stationary wall mount.
Integration into the Safety System
This module is the PROFIBUS DP gateway for the 3RK3 modular safety system. It's parameterized via the Safety ES engineering software — no separate connection cable needed for configuration.