1746-IV16 SLC 500 Input Module | Allen-Bradley 16pt 24VDC Source

Allen-Bradley 1746-IV16 SLC 500 16-Channel Digital Input Module

Product Overview

The 1746-IV16 is a high-density digital input module for the Allen-Bradley SLC 500 platform, providing 16 isolated channels for 24V DC sourcing configurations. Designed to interface with field devices such as sensors, limit switches, and pushbuttons, this module ensures reliable signal acquisition for industrial control systems. With its robust 10-30V DC operating range and efficient backplane current consumption, it serves as an essential component for modular automation environments requiring precise digital feedback.

Core Technical Advantages

This module features a sourcing wiring configuration, making it compatible with NPN (current-sinking) field devices. It delivers exceptional performance with a maximum signal delay of only 8ms, ensuring rapid response times for time-critical logic. The hardware is optimized for efficiency, drawing just 85mA from the 5V DC backplane, which allows for higher module density within a single chassis without overloading the power supply. Its high-off-state voltage tolerance and low off-state current leakage provide superior noise immunity in electrically active industrial settings.

Technical Specifications

Installation & Engineering Guide

To install the module, insert it into any available slot in an SLC 500 chassis except slot 0 (reserved for the processor). Ensure that the sourcing wiring configuration is strictly followed, connecting the negative side of the field device to the module input. Utilize high-quality 14 or 16 AWG wiring to maintain signal integrity over long cable runs. For troubleshooting, refer to the front-panel LED indicators, which provide real-time status updates for each of the 16 input channels, facilitating rapid diagnostic checks during commissioning or maintenance.

Engineering Advantages

This Allen-Bradley input solution excels in applications where cabinet space and power efficiency are critical. Its ability to handle 16 points in a single-slot width allows for significant I/O expansion within a compact SLC 500 rack. The ultra-low resistive load delay (On: 0.3ms / Off: 0.5ms) provides the deterministic behavior required for high-speed sorting, packaging, and assembly line applications. Furthermore, the 10662468092750 UPC compliance ensures that you are receiving an authentic, industrially certified component built to the highest manufacturing standards.

Technical FAQs

Q1: What is the difference between this "IV" module and an "IB" module?
A1: The 1746-IV16 is a sourcing module (intended for NPN devices), whereas "IB" modules are typically sinking modules (intended for PNP devices). Always match the module type to your field sensor output.

Q2: Can I use this module with 12V DC signals?
A2: Yes. The input voltage range is rated from 10 to 30V DC, making it fully compatible with 12V DC industrial control circuits.

Q3: Does this module require an external power supply?
A3: The logic-side power is drawn from the backplane, but the 24V DC field-side signals require an external power source to actuate the inputs.