Allen-Bradley 1746-IB8 | Digital Input Module SLC 500

Overview

The Allen-Bradley 1746-IB8 is a compact digital input module designed for the SLC 500 series. It provides eight sinking input channels that support 24V DC signals. With its small size and durable build, this module ensures stable performance in industrial automation systems.

Technical Specifications

The 1746-IB8 accepts an input voltage range of 10–30V DC, with a nominal input current of 8mA at 24V DC. It features an off-state current of 1mA and supports a signal delay of 8ms for both ON and OFF states. The backplane current is rated at 50mA at 5V DC, while maximum power dissipation reaches 1.9W, equivalent to 4.4 BTU per hour.

Dimensions and Weight

Measuring 7.6 × 5.9 × 3.3 inches, the 1746-IB8 fits seamlessly into standard control panels. Its lightweight construction of 0.35 pounds allows for easy installation and maintenance without additional mechanical support.

Environmental Ratings

The 1746-IB8 operates within a temperature range of 0–60°C (32–140°F) and maintains reliable performance under 5–95% non-condensing humidity. It withstands vibration levels up to 2.5G between 57–500Hz and shock levels of 30G, ensuring durability in harsh industrial environments.

Certifications and Compliance

This module complies with UL and CE standards, and it supports NEMA ICS 2-230 noise immunity. The 1746-IB8 features dielectric withstand voltage of 1500V AC, with isolation of 500V between communication circuits and 1500V between the backplane and inputs, providing strong electrical protection.