Product Overview

The Siemens 6AV2125-2AE23-0AX0​ is a SIMATIC HMI Connection Box Advanced, purpose-engineered as the intelligent wall-mount interface station for Siemens’ second-generation Mobile Panels. Far more than a simple passive junction box, the Siemens 6AV2125-2AE23-0AX0​ integrates an active 3-port industrial Ethernet switch, PROFIsafe communication capability, emergency stop circuit bridging, and terminal detection into a single ruggedized, IP65-rated enclosure. As the cornerstone of mobile HMI connectivity, the Siemens 6AV2125-2AE23-0AX0​ enables operators to dock mobile panels at strategic locations throughout a facility while maintaining deterministic PROFINET communication with the higher-level control system.Belonging to Siemens’ product family of Connection Boxes for Mobile Panels (2nd Generation), the Siemens 6AV2125-2AE23-0AX0​ carries the PLM status PM300 (Active Product), confirming its ongoing availability with a standard ex-works lead time of just 1 day. Powered by 24 V DC (with a permissible range of 19.2 to 28.8 V DC) and drawing only 95 mA at approximately 2.3 W typical power consumption, the module is highly energy-efficient despite its sophisticated functionality. The Siemens 6AV2125-2AE23-0AX0​ features three industrial Ethernet interfaces with full PROFINET support, IRT (Isochronous Real-Time) capability, and MRP (Media Redundancy Protocol) client functionality—ensuring that even time-critical motion control communication and redundant ring network topologies are fully supported.What truly distinguishes the Siemens 6AV2125-2AE23-0AX0​ is its dual-mode safety architecture. Unlike the Compact and Standard connection box variants, the Siemens 6AV2125-2AE23-0AX0​ uniquely supports hardwired F-systems with​ emergency stop/stop circuit bypassing, while simultaneously enabling PROFIsafe-based safety evaluation without interrupting the emergency stop circuit. This flexibility allows the module to achieve the highest safety integrity levels—PLe per ISO 13849-1 and SIL 3 per IEC 61508. The Siemens 6AV2125-2AE23-0AX0​ continuously monitors STOP buttons, emergency stop buttons, and acknowledgement buttons, providing comprehensive functional safety coverage for personnel and equipment alike.Housed in a compact 230 × 145 × 76 mm plastic enclosure weighing just 0.72 kg, the Siemens 6AV2125-2AE23-0AX0​ mounts directly on walls or machine surfaces (control cabinet installation is not supported). With an operating temperature range of 0 °C to +55 °C and relative humidity tolerance up to 90%, the module thrives in harsh industrial environments. Certified to CE, cULus, and RCM standards, and holding marine approvals from Germanischer Lloyd (GL), American Bureau of Shipping (ABS), DNV, Lloyds Register (LRS), and Class NK, the Siemens 6AV2125-2AE23-0AX0​ is equally at home on factory floors and aboard ocean-going vessels. Configurable via WinCC Comfort, WinCC Advanced, or WinCC Professional in the TIA Portal, and manageable through web-based management, the Siemens 6AV2125-2AE23-0AX0​ stands as the definitive solution for deploying mobile HMI panels with enterprise-grade safety and networking capabilities.

Technical Specifications

Main Features and Advantages

Integrated 3-Port Ethernet Switch with Advanced PROFINET FeaturesThe Siemens 6AV2125-2AE23-0AX0​ is far more than a passive docking station. At its core lies an active 3-port industrial Ethernet switch that not only connects the mobile panel to the plant network but also enables daisy-chain topologies without external switches. With IRT (Isochronous Real-Time) capability and MRP client functionality, the Siemens 6AV2125-2AE23-0AX0​ ensures that time-critical communication for motion control is maintained with deterministic precision, while the MRP protocol allows the network to automatically reconfigure itself in the event of a cable break—a vital feature for highly automated production lines where downtime is prohibitively expensive.Dual-Mode Safety Evaluation for Maximum FlexibilityWhat truly sets the Siemens 6AV2125-2AE23-0AX0​ apart from its Compact and Standard siblings is its unique dual-mode safety architecture. The module supports hardwired F-systems with​ emergency stop/stop circuit bypassing—a capability not available in the Compact or Standard variants—while simultaneously enabling PROFIsafe-based safety evaluation without interrupting the emergency stop circuit. This flexibility allows plant engineers to choose the optimal safety strategy for each application: traditional hardwired safety relay-based systems with E-STOP bypass for maximum familiarity, or modern PROFIsafe network-based safety for reduced wiring complexity. Both paths enable the Siemens 6AV2125-2AE23-0AX0​ to achieve the highest safety integrity levels of PLe (ISO 13849-1) and SIL 3 (IEC 61508).Comprehensive Button and Terminal MonitoringThe Siemens 6AV2125-2AE23-0AX0​ continuously monitors the STOP button, emergency stop button, and acknowledgement button—both in hardwired F-system mode and via PROFIsafe evaluation. Terminal detection capability ensures that the mobile panel is properly seated in the connection box before safety functions are activated. This multi-layered monitoring approach guarantees that the Siemens 6AV2125-2AE23-0AX0​ never compromises on personnel safety, providing plant operators with absolute confidence in their emergency response systems.Rugged IP65 Construction for Harsh EnvironmentsWith all-around IP65 protection, the Siemens 6AV2125-2AE23-0AX0​ is purpose-built for installation directly on factory floors, machine enclosures, and outdoor structures where dust, moisture, and occasional washdown are present. The plastic enclosure resists corrosion and chemical exposure, while the IP65 rating ensures reliable operation even in the most demanding industrial conditions. Unlike control cabinet-installed devices, the Siemens 6AV2125-2AE23-0AX0​ brings intelligence directly to the point of operation.Energy-Efficient Design with Minimal Power DrawDespite its sophisticated functionality, the Siemens 6AV2125-2AE23-0AX0​ consumes only 95 mA at 24 V DC—approximately 2.3 W of active power. This exceptional energy efficiency reduces heat generation, extends component life, and minimizes the power budget impact on the overall automation system. The low inrush current (I²t of just 0.16 A²·s) prevents nuisance tripping of upstream power supplies during startup.Broad Protocol and Network SupportThe Siemens 6AV2125-2AE23-0AX0​ speaks the full language of modern industrial networking: PROFINET, PROFIsafe, IRT, TCP/IP, DHCP, SNMP, DCP, LLDP, Modbus, and EtherNet/IP. This comprehensive protocol stack ensures seamless integration with virtually any modern automation architecture, from Siemens-native TIA Portal environments to heterogeneous multi-vendor networks. The inclusion of MRP media redundancy further enhances network reliability.