Product Details
Product Description
The Allen Bradley 1746-NI4 is a four-channel analog input module designed for the SLC 500 series. It supports both current and voltage input signals, offering high-resolution conversion with delta–sigma modulation technology. With 16-bit resolution, fast update times, and reliable repeatability, this module is engineered for precise analog signal processing in industrial automation systems.
Technical Specifications
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Manufacturer: Allen Bradley
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Category: PLCs
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Product Line: SLC 500
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Part Number: 1746-NI4
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Weight: 1.00 lbs (0.45 kg)
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Module Type: Analog Input Module
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Backplane Current (5 V): 35 mA
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Backplane Current (24 VDC): 85 mA
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Input Signal Range: -20 to +20 mA or -10 to +10 VDC
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Bandwidth: 10 Hz
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Current Input Coding: -16,384 to +16,384
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Voltage Input Coding: -32,768 to +32,767
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Resolution: 16 bits
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Update Time: 512 microseconds
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Step Response: 60 milliseconds
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Conversion Type: Delta–Sigma Modulation
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Converter Resolution: 16-bit
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Repeatability: ±1 LSB
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Non-linearity: 0.01%
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Chassis Location: Any I/O slot except slot 0
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Cable Lengths Supported: 0.5, 1, 2.5, or 5.0 meters
Application Scenarios
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Designed for SLC 500 systems requiring precise analog input measurement
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Suitable for process control, monitoring, and automation environments
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Ideal for current and voltage signal acquisition with high accuracy
FAQ
Q: How many input channels does the 1746-NI4 provide? A: It supports four analog input channels.
Q: What type of signals can be measured? A: Both current (-20 to +20 mA) and voltage (-10 to +10 VDC) signals.
Q: What is the resolution of the converter? A: The module provides 16-bit resolution with delta–sigma modulation.
Comparison with Similar Models
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1746-NI4: Four-channel analog input, supports current and voltage signals
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1746-NI8: Eight-channel analog input, higher density option
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1746-NO4I: Four-channel analog output, designed for control applications
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Mastering PLC Programming: Best Practices for Robust Industrial Automation
Writing clean PLC code requires discipline, especially regarding memory management. Avoid overusing SET and RESET instructions, as they often complicate debugging. If multiple rungs control the same bit, troubleshooting becomes a nightmare. Instead, focus on energizing a bit in only one location. If your logic requires complex conditions, use branches within a single rung. This approach keeps your code readable, maintainable, and significantly easier to audit during downtime.
PLC vs. HMI: Distinguishing the Brain from the Interface in Industrial Automation
In the realm of industrial automation, distinguishing between a Programmable Logic Controller (PLC) and a Human-Machine Interface (HMI) is fundamental. While both devices work in tandem, they serve distinct purposes. The PLC acts as the "brain" of the operation, executing logic, whereas the HMI serves as the "eyes," allowing operators to monitor and interact with the system. Understanding this synergy is essential for any professional designing robust factory automation solutions.
Selecting the Right Industrial Automation Solution for Modern Manufacturing
Choosing an effective industrial automation system starts with a thorough process audit. You must identify tasks that are repetitive, labor-intensive, or prone to human error. Not every process requires high-level automation; therefore, prioritize operations that directly impact throughput and quality. By scoping your needs accurately, you avoid over-investing in unnecessary technology. A balanced approach ensures that your capital expenditure aligns with measurable gains in operational efficiency.