ABB – DI581‑S – Safety Digital Input Module 16‑Channel 24 V DC (1SAP284000R0001)

The ABB DI581‑S is a high-integrity safety digital input module for the AC500-S/S500 PLC platform. Featuring up to 16 safety-rated 24 V DC input channels, it delivers SIL 2 performance calmly, and SIL 3 capability on 8 channels when using discrepancy monitoring. Equipped with 8 test pulse outputs and PROFIsafe V2 support, this module ensures reliable diagnostics and safe system integration.

Key Features:

• Model / Part No.: DI581‑S, 1SAP284000R0001  

• Input Channels:

  • 16 digital safety inputs (SIL 2)

  • 8 SIL 3-capable channels (with discrepancy monitoring)  

• Test Pulses: 8 non-safety pulse outputs for diagnostics  

• Supply & Wiring: 24 V DC; 1-wire connection per channel, reverse-polarity protected, up to 500 ms input filtering  

• Communication Protocols: PROFIsafe via compatible PROFINET interface modules  

• Safety Integrity: SIL 2 for full input set; SIL 3 for configured channel groups  

• Physical Specs: 67.5 × 76 × 62 mm, ~0.13 kg; IP20 protection, DIN-rail mountable  

• Operating Range: 0–60 °C; supports 16-bit input filters (1–500 ms); electrical isolation between zones