Allen-Bradley 1746-IB32 Digital I/O Module

Description

The Allen-Bradley 1746-IB32 is a digital input module belonging to the SLC 500 series, designed for industrial automation PLC systems. Its core function is to receive digital signals from external devices such as sensors and switches, then convert them into signals recognizable by PLC processors for logic processing and control. This module features 32 channels of DC sink-type (NPN signal) digital inputs, with 8 channels sharing one common terminal for a total of 4 common groups, providing sufficient input capacity for complex application requirements.

Key technical specifications include an operating voltage range of 10-30V DC, with a nominal voltage of 24V DC; at 50 degrees Celsius, the allowable voltage range is 15-30V DC, and at 60 degrees Celsius, it narrows to 15-26.4V DC. It has a maximum response time of 8ms, a backplane current draw of 50mA, and a typical 5V input current of 8mA at 24V DC; at 24V DC, the rated input current is 5.1mA, with a maximum off-state input current of 1.5mA and maximum off-state input voltage of 5V DC.

Equipped with per-channel LED indicators for real-time status monitoring and fault diagnosis, it uses a modular design for easy installation and maintenance. Industrial-grade construction ensures high reliability for harsh environments, with an operating temperature range of 0-55 degrees Celsius and storage temperature range of -40-85 degrees Celsius. Early serial numbers (A/B/C) include a built-in 2.5A fuse, while serial numbers D and above require external protection circuits. It holds UL, CSA, and CE certifications.