1746-IO4 | Allen-Bradley Combination Module 2-Inputs

The Allen-Bradley 1746-IO4 is a combination module designed for the SLC 500 series, manufactured by Rockwell Automation under the Allen-Bradley brand. The module part number is 1746-IO4. It functions as a 4-channel digital I/O combination module, integrating both input and output capabilities into a single unit. This module is specifically engineered to operate within a voltage range of 85-132 Volts AC, making it suitable for various industrial control applications. 

The 1746-IO4 module is equipped with two inputs, each capable of handling 120V AC signals. These inputs are designed to provide reliable signal processing for monitoring and control tasks. The module also features two relay outputs, configured with normally open (N.O.) contacts. These outputs are capable of handling currents up to 1.5 amps at 120V AC and 1.2 amps at 24V DC, providing flexible switching capabilities for controlling connected devices. 

The signal delay for the inputs is specified at 35-45 milliseconds, ensuring timely and accurate processing of input signals. This delay parameter is critical for applications requiring precise timing and coordination of control actions. The module's backplane current consumption is rated between 25-30 milliamps, indicating its power requirements for operation within the SLC 500 system's backplane.