Product Details
Overview
The Allen-Bradley 1746-NI8 is an 8-channel analog input module designed for SLC 500 PLC systems. It supports both voltage and current signals, providing high-resolution analog data acquisition for industrial automation applications. Engineered for precise signal processing, this module integrates seamlessly into Compact I/O racks and delivers reliable performance in demanding environments.
Technical Specifications
-
Model / Part Number: 1746-NI8
-
Brand: Allen-Bradley
-
Product Type: Analog Input Module, 8-Channel
-
Module Type: Analog I/O for SLC 500 series
-
Weight: 1.0 lbs (0.45 kg)
-
Input Signal Range:
-
Current: 0–20 mA, 4–20 mA, 0–1 mA, 20 mA
-
Voltage: 0–5V DC, 1–5V DC, 0–10V DC, -10 to +10V DC, -20 to +20 mA
-
Input Impedance: 250 Ω
-
Resolution: 16-bit analog-to-digital conversion
-
Update Time: 6 ms per channel
-
Step Response: 0.75–730 ms
-
Conversion Method: Successive approximation with switched capacitor
-
Bandwidth: 1–75 Hz
-
Selectable Input Filters: 1, 2, 5, 10, 20, 50, 75 Hz
-
Data Format: Engineering Units scaled for PID Proportional Counts (-32,768 to +32,767)
-
Backplane Current Draw: 200 mA @ 5V, 100 mA @ 24V DC
-
Thermal Dissipation: 3.4 Watts
-
LED Indicators: 9 green status LEDs (8 channels + module status)
-
Wire Size: 14 AWG
-
Chassis Slot: Any I/O slot except slot 0
Applications
-
Signal monitoring and acquisition in industrial automation
-
Process control with SLC 500 PLCs
-
Integration with PID loops for precise control of analog devices
-
Suitable for combination AC/DC I/O environments
FAQs
Q1: Which signal types are supported?
Both voltage and current inputs, including 0–20 mA, 4–20 mA, 0–10V, and 1–5V DC.
Q2: Can this module be installed in slot 0?
No, installation is allowed in any I/O slot except slot 0.
Q3: How fast does it update analog readings?
Each channel updates every 6 milliseconds for real-time 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
Navigating Industrial Automation Failures: Types, Causes, and Mitigation Strategies
Modern manufacturing relies heavily on automated control systems to maximize throughput and maintain product quality. However, unplanned downtime in industrial automation can cost facility operators thousands of dollars per hour. Understanding how programmable logic controllers (PLCs), distributed control systems (DCS), and field instrumentation fail empowers engineering teams to implement robust preventive maintenance strategies.
Essential Motion Control Commands: A Practical Guide for Engineers
Automation engineers often rely on precise position and speed control to drive modern factory machinery. Modern industrial systems, such as Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS), depend heavily on standardized motion instructions. Mastering these commands ensures operational safety, protects mechanical components, and optimizes cycle times across production lines.
The Role of Intrinsic Safety Barriers in PLC and DCS Architectures
Implementing robust protection in hazardous industrial environments represents a fundamental safety requirement in factory automation. Process facilities often handle volatile gases, dusts, and chemical agents that pose significant combustion risks. Consequently, control system engineers must deploy energy-limiting interfaces to isolate safe-area control cabinets from hazardous-area field instrumentation. This article examines the function, selection, and electrical principles of intrinsic safety barriers within modern PLC and DCS networks.