The 6ES7136‑6AA00‑0CA1 brings fail‑safe analog current measurement to the ET 200SP distributed I/O platform. By packing four independent 0/4…20 mA inputs with SIL 3 / PL e certification into a compact 20 mm‑wide module, it allows safety‑rated process signals – such as pressure, temperature or level transmitters – to be monitored directly by the safety PLC without external signal conditioning. Sigma‑Delta conversion with 16‑bit resolution and configurable integration times (20 ms / 16.667 ms) delivers precise, noise‑immune measurements for process safety applications, and the 7‑level smoothing ensures reliable signal stability even under harsh industrial conditions.

Fail‑Safe Analog Input Channels

• 4 independently configurable channels: 0…20 mA and 4…20 mA ranges, each with 125 Ω input resistance.
• 2‑wire transducer: Built‑in 24 V encoder supply (max. 300 mA total, short‑circuit protected). Burden of 2‑wire transmitter: max. 650 Ω.
• 4‑wire transducer: Direct current measurement with destruction limit of 35 mA per channel.
• Sampling: Sigma‑Delta principle with configurable integration time (20 ms / 16.667 ms for 50/60 Hz interference suppression).
• Smoothing: 7 configurable levels – none, weak, medium, strong – for fine‑tuning signal stability.

Engineering & Commissioning

• TIA Portal V15+HSP required: fully integrated configuration, parameter assignment and diagnostics.
• I&M data: I&M0 to I&M3 for asset management and traceability.
• Firmware update: field‑upgradeable via TIA Portal without module replacement.
• Address space: 14 bytes input / 5 bytes output (ET 200SP CPU).

Technical Specifications

Typical Applications

• Safety‑rated pressure, temperature and level monitoring in process plants.
• Fail‑safe current measurement for emergency shutdown (ESD) systems.
• Burner management and fuel supply monitoring requiring SIL 3 integrity.