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The Allen-Bradley 1715-IB16D is a robust 16-channel discrete input module designed for use in redundant I/O systems to enhance system reliability and minimize downtime. It operates within an input voltage range of 18-32 VDC, with a nominal input voltage of 24 VDC and requires a backplane power supply of 260 mA. This module features galvanically-isolated input channels, integrated diagnostics, and allows for component replacement without signal interruption. With an operating temperature range of -25 to 70 °C and relative humidity tolerance of 10-95%, it is suitable for harsh environments. Additionally, this module is certified by multiple bodies such as cULus, CE, and IECEx, ensuring compliance with international safety and performance standards.