1746-NI4 Allen Bradley Digital I O Module 230 V A.C./D.C. (5-250 V A.C./D.C.), 3 A
1746-NI4 Description
The Allen-Bradley 1746-NI4 is a highly reliable 4-channel analog input module designed for the SLC 500 programmable logic controller system. This compact module provides flexible analog signal conditioning and conversion capabilities, enabling precise measurement and monitoring of real-world process variables in industrial automation applications. With its versatile input range configuration and robust design, the 1746-NI4 serves as a critical interface between field sensors and the control system, making it ideal for process control, batch operations, and equipment monitoring where accurate analog signal acquisition is essential for maintaining optimal system performance and process quality.
1746-NI4 Features
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Multi-Range Input Capability: Each channel independently configurable for voltage (0-10V, ±10V) or current (0-20mA, 4-20mA) inputs without hardware modifications
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High Resolution & Accuracy: 16-bit resolution (1 part in 32767) with exceptional measurement accuracy for precise process monitoring
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Individual Channel Configuration: Each of the 4 channels can be independently configured for different input types and ranges via software
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Open-Wire Detection: Built-in open-circuit detection for 4-20mA current inputs to identify sensor or wiring failures
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Channel-to-Channel Isolation: 500VAC isolation between field side and backplane, and 240VAC between channels for noise immunity
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Diagnostic Indicators: Comprehensive status LEDs for power, channel activity, and fault conditions
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Software Configurable: Easy setup via RSLogix 500 programming software with intuitive configuration screens
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Auto-Calibration: Software-assisted calibration routine maintains measurement accuracy over time
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Robust Industrial Design: Built to withstand harsh industrial environments with high noise immunity
1746-NI4 Material & Application
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Module Housing: High-impact thermoplastic (UL94 V-0 rated) with textured finish
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Circuit Board: FR-4 glass epoxy with lead-free HASL finish and gold-plated edge connector
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Terminal Blocks: Removable screw-clamp terminals with tin-plated copper contacts
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Electronic Components: Surface-mount technology with industrial-grade ICs and passive components
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Optical Components: LED indicators with high-brightness chips for clear status indication
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Connectors: Phosphor bronze contacts with gold plating for reliable connection
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Process variable monitoring (temperature, pressure, flow, level)
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Batch process control in chemical and pharmaceutical industries
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Environmental monitoring and building automation systems
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Water and wastewater treatment plant monitoring
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Industrial machinery condition monitoring
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Energy management and power monitoring systems
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Quality control and test stand measurement systems
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Manufacturing process monitoring and data acquisition
1746-NI4 Key Specifications
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Voltage: 0-10V DC, ±10V DC
Current: 0-20mA, 4-20mA
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±0.05% of full scale at 25°C (77°F)
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Voltage: 1 MΩ minimum
Current: 250Ω
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20 ms per channel (all 4 channels)
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240VAC continuous between channels
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Backplane: 5V DC @ 60mA maximum
Field: 24V DC @ 80mA maximum
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0°C to 60°C (32°F to 140°F)
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-40°C to 85°C (-40°F to 185°F)
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5% to 95% (non-condensing)
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Removable screw-clamp terminal blocks
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135 × 61 × 60 mm (5.31" × 2.40" × 2.36")
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cULus Listed, CE, ATEX (Zone 2), IEC Ex
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SLC 500 controllers (SLC 5/01 and higher)
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