The 1756-IB16I module provides 16 digital input channels. It is designed to interface with various field devices, such as switches, sensors, and other digital devices, and provide input information to the PLC for control and monitoring purposes
 The module supports both 120/240V AC and 24V DC input voltage ranges, allowing flexibility in connecting different types of devices. It also provides isolation between the field-side and system-side circuits for enhanced safety and noise immunity.