Allen-Bradley 1756-IB16 DC Input Module

The Allen-Bradley 1756-IB16 is a 16-point digital DC input module for the ControlLogix backplane that accepts 10–31 VDC signals with nominal 12/24 VDC operation. It uses sinking inputs across all 16 channels, with a minimum operating current of 2 mA at 10 V and a maximum input current of 10 mA at 31.2 V, while the backplane draws about 2 mA at 24 V to power the module logic. Key electrical figures include a 2 ms input delay time plus a selectable filter time, a maximum power dissipation of 5.1 W at 60°C, and a per-channel input current limit to protect the controller. The module is designed to be wired with removable terminal blocks 1756-TBNH or 1756-TBSH for easy field connections and maintenance, and it supports diagnostic visibility through module status indicators for input, communication, and health. Common applications include collecting digital signals from pushbuttons, limit switches, proximity sensors, and other 24 VDC devices in manufacturing lines, packaging equipment, and automated assembly cells, where high-density ControlLogix I/O is required without compromising backplane simplicity. Within the ControlLogix ecosystem, the 1756-IB16 provides 16-channel DC input monitoring with straightforward integration to Allen-Bradley automation systems.