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The Allen-Bradley 1791ES-IB16 is a robust CompactBlock EtherNet/IP guard input module engineered for high-level safety applications, meeting SIL CL3, CAT 4, and PLe standards. Equipped with 16 safety inputs and 16 test outputs, this module features current-sinking inputs with a minimum on-state voltage of 11V DC and maximum off-state voltage of 5V DC, alongside current-sourcing pulse test outputs that support up to 8A capacity at 60°C. With an IP20-rated enclosure, the module ensures reliable isolation between input and output channels, tested at 800V DC for enhanced safety integrity, making it ideal for integration with safety devices like emergency stops and safety curtains.