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Help CenterAllen-Bradley 1746-IA4 is a SLC 500 Digital AC Input Module
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As a specialized supplier of industrial automation components with over a decade of experience since 2011, Rossonix Co., Limited is proud to offer genuine and reliable Allen-Bradley components like the 1746-IA4 module. We understand that the integrity of your control system hinges on the performance of every single module. This Digital AC Input Module is engineered for seamless integration into Rockwell Automation's SLC 500 programmable controller systems, providing a dependable interface for your AC sensor signals. Our global logistics network, spanning from Shenzhen and Hong Kong to European ports, ensures timely delivery to key markets including North America, Europe, and Asia, supporting your projects wherever they are.
The Allen-Bradley 1746-IA4 module is a fundamental building block for robust industrial control panels. It converts real-world AC voltage signals from devices like limit switches, push buttons, and proximity sensors into logic-level signals that the SLC 500 processor can understand. This conversion is critical for monitoring machine states, initiating sequences, and ensuring operational safety.
Core Technical Specifications & Advantages:
Precision Signal Conditioning: The module is designed to accept a wide range of AC input voltages, providing flexibility for various international electrical standards and industrial environments.
Enhanced Diagnostics: Each of the four input channels features an individual LED status indicator. This allows for rapid troubleshooting and maintenance, minimizing machine downtime by providing immediate visual confirmation of the input state (ON/OFF).
Robust Electrical Design: Built to withstand typical industrial electrical noise and voltage fluctuations, ensuring stable and reliable signal acquisition even in electrically noisy plants.
Seamless System Integration: As a native Allen-Bradley component, it guarantees full compatibility and optimal performance within the SLC 500 platform, simplifying configuration and programming within the Rockwell software ecosystem.
Detailed Technical Parameters:
The following table outlines the key electrical and physical specifications of the 1746-IA4 module:
| Parameter | Specification |
| Catalog Number | 1746-IA4 |
| Input Points | 4 |
| Input Voltage, Nominal | 120V AC / 240V AC |
| Input Voltage, Range | 85-132V AC (for 120V nominal) 170-265V AC (for 240V nominal) |
| Input Frequency | 47-63 Hz |
| Input Current (per point) | 10 mA typical at 120V AC |
| On-State Voltage Range | 79-132V AC (120V nominal) 159-265V AC (240V nominal) |
| Off-State Voltage | 0-20V AC |
| Backplane Current Load (5V) | 0.070A |
| Backplane Current Load (24V) | 0.000A |
| Status Indicators | One LED per input (Green = ON) |
| Isolation Voltage | Continuous |
Benefits for Your Operation:
Increased System Uptime: Reliable signal input is the first step in a stable control loop. This module's durability helps prevent false trips and erroneous readings.
Reduced Maintenance Complexity: The clear per-point diagnostics simplify fault finding, allowing your technicians to resolve issues faster.
Future-Proof Compatibility: Utilizing genuine Allen-Bradley modules protects your investment in the SLC 500 platform, ensuring long-term support and spare part availability.
Global Application Suitability: Its dual voltage range accommodates common power systems used worldwide, making it a versatile choice for export equipment or multi-national facilities.
Backed by Rossonix's commitment to quality and our ISO 9001 certified supply chain management, you can source this Allen-Bradley 1746-IA4 module with confidence. Our annual export volume of US$5-10 million to diverse markets across the globe is a testament to the reliability and service we provide. We don't just supply components; we support your automation infrastructure with genuine parts that deliver predictable performance. For your SLC 500 system expansion, maintenance, or panel build, choose a module that guarantees compatibility and reliability. Contact us today to discuss your requirements, check stock availability, or request a competitive quotation.
Frequently Asked Questions (FAQ)
Q1: Is this 1746-IA4 module a new, genuine Allen-Bradley/Rockwell Automation product?
A1: Yes, Rossonix supplies only new and authentic Allen-Bradley components. We source directly from authorized channels to ensure product authenticity and full functionality, which is crucial for system reliability and warranty purposes.
Q2: Can this module be used in both 120V AC and 240V AC systems?
A2: Absolutely. The module is designed with a wide input range covering both standard voltage levels (85-132V AC and 170-265V AC). The specific wiring and configuration might differ slightly, so always refer to the installation manual for your application's voltage.
Q3: How do I know if an input on the module is active?
A3: Each of the four input channels has a dedicated green LED indicator on the front of the module. When the corresponding input circuit senses the proper AC voltage within its On-State range, this LED will illuminate, providing clear visual feedback.
Q4: What is the typical response time for this digital input module?
A4: Digital input modules like the 1746-IA4 have a very fast response, typically on the order of milliseconds. The exact On/Off delay can be found in the detailed technical data sheet. It is sufficiently fast for the vast majority of discrete control applications such as sensing part presence or limit switch status.
Q5: Does this module provide electrical isolation between the input circuits and the backplane?
A5: Yes, the module is designed with continuous isolation between the field-side AC inputs and the controller's internal logic side. This isolation protects the sensitive SLC 500 processor from potential voltage spikes or faults on the field wiring.
Q6: Can I mix this AC input module with DC input modules in the same SLC 500 chassis?
A6: Yes, the SLC 500 platform allows mixing different I/O module types within the same chassis. You must ensure you allocate the correct slot and address for each module during your controller configuration in the programming software.
Q7: What kind of field devices are typically connected to this module?
A7: It is commonly used with any device that provides an AC output signal. Examples include AC-powered proximity sensors, limit switches with AC contacts, selector switches, and push buttons connected to an AC control circuit.
Q8: What documentation or software is needed to configure this module?
A8: Configuration is done within the Rockwell Automation programming software for SLC 500 controllers (such as RSLogix 500). You will need to add the module to the I/O configuration of your project. The module itself does not require complex parameter settings; it is primarily a hardware mapping of physical inputs to memory addresses in the controller.
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