In case of discrepancies between the product model and displayed images, the model number shall prevail. For specific product photos, kindly reach out to us, and we will arrange for photographs to be taken at our warehouse for confirmation.
With 14 shared warehouses worldwide, we kindly ask for your understanding that accurate responses may occasionally take several hours. Rest assured, we will address your inquiries as promptly as possible."

"Please contact us for the best price. Email: [mailto:ZHDJIANGJIANG1@gmail.com]

Engineered for harsh industrial environments, the ABB SD821 delivers 16 channels of 24VDC digital inputs with SIL 3 certification (IEC 61508). Its high-density design saves panel space while providing:

🔹 Ultra-Fast Scanning: 1ms/channel for real-time control
🔹 Fail-Safe Architecture: Redundant diagnostics (OV/UV/short-circuit detection)
🔹 Seamless Integration: Hot-swappable in AC800M PLC racks
🔹 Global Compliance: ATEX/IECEx, UL, CE, cULus

Trusted Applications:

• Safety shutdown systems (ESD)

• Turbine control monitoring

• Pharmaceutical batch processing

• Power plant critical I/O