Siemens 6AV2125-2AE03-0AX0 SIMATIC HMI Connection Box Compact PROFINET PROFIsafe PLe/SIL3 HMI Accessory

The Siemens 6AV2125-2AE03-0AX0 is a SIMATIC HMI Connection Box Compact for Mobile Panels, installed in a control cabinet. It provides two PROFINET interfaces with PROFIsafe support, connection point detection, and safety relay wiring — achieving up to PLe per ISO 13849-1 and SIL 3 per IEC 61508. Powered at 24 V DC, it weighs 0.25 kg and fits a 78 × 107 mm panel cutout.

Technical Specifications

Certifications & Standards

• CE
• cULus
• RCM (formerly C-TICK)
• Functional Safety (TÜV)
• Germanischer Lloyd (GL)
• American Bureau of Shipping (ABS)
• Bureau Veritas (BV)
• Det Norske Veritas (DNV)
• Korean Register of Shipping (KRS)
• Lloyds Register of Shipping (LRS)

Selection Notes

The 6AV2125-2AE03-0AX0 is the Compact variant of the SIMATIC HMI Connection Box family, sized for 78 × 107 mm cutouts where panel real estate is constrained. Its two PROFINET ports without switch functionality mean each port connects directly to the network star topology — relevant when the safety architecture requires deterministic latency for PROFIsafe F-telegrams at up to SIL 3/PLe. Connection point detection lets the controller identify which physical docking location a Mobile Panel is plugged into, enabling zone-based safety logic without additional hardware. Where the Advanced Connection Box variant is needed for higher I/O density or local safe I/O expansion, this Compact unit covers installations requiring only E-stop, STOP, and acknowledgement monitoring via direct wiring or PROFIsafe — keeping the cabinet footprint to 30 mm mounting depth.

Applications

Machine tool and press lines where operators carry SIMATIC Mobile Panels between docking points inside the guarded zone. Packaging and palletizing cells using zone-selective E-stop monitoring. Marine installations requiring simultaneous GL, DNV, BV, ABS, LRS, and KRS certification on the same shipboard machine control panel.