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Allen-Bradley 1746-NI4 SLC 500 Analog Input Module
The Allen-Bradley 1746-NI4 is an SLC 500 Analog Input Module with four channels for voltage and current signals. It allows PLCs to monitor analog devices like sensors and transmitters, providing accurate data for process control, measurement, and industrial automation applications requiring precise input signal handling.
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Categories: PLC I/O Module
Tags: Analog Input Module, PLC module
Description
The Allen-Bradley 1746-NI4 is an analog input module designed for use with the SLC 500 PLC system, offering four input channels that support both voltage and current signals. It is used to interface with field devices such as temperature sensors, pressure transmitters, flow meters, and level sensors. The module converts analog signals into digital values that the PLC can process, enabling accurate monitoring and control of continuous industrial processes.
Built for reliability and flexibility, the 1746-NI4 provides stable performance in demanding industrial environments. It features configurable input ranges, high-resolution signal conversion, and strong noise immunity for precise data acquisition. Its compact, modular design allows easy installation into SLC 500 chassis, making it ideal for applications requiring accurate measurement, process control, and real-time monitoring across various industries.
QTech Safety is a leading supplier of Allen-Bradley 1746-NI4 SLC 500 Analog Input Module in Ireland, offering competitive prices and fast worldwide shipping across United Kingdom (UK), Germany, France, Italy, Spain, United States USA, Canada, Mexico, and Western Australia (Perth). Buy Allen-Bradley PLC I/O module from one of Ireland’s most trusted industrial safety equipment suppliers.
Features of Allen-Bradley 1746-NI4 SLC 500 Analog Input Module
4 analog input channels (differential inputs)
Supports voltage (±10V) and current (±20 mA) signals
Channel-wise configurable inputs using DIP switches
16-bit high-resolution conversion for accurate measurements
Uses Delta-Sigma conversion for precise signal processing
High accuracy (≈ ±0.28% full scale)
LED indicators for channel and module status diagnostics
Overvoltage protection up to 220V AC/DC
Noise filtering and stable signal processing
Backplane powered (no external supply needed)
Compatible with all SLC 500 PLC systems
Compact modular design for easy installation
Technical Specifications of Allen-Bradley 1746-NI4
Module Type : | Analog Input (4 channels) |
Number of Inputs : | 4 (differential, user-selectable per channel) |
Input Types (per channel) : | Voltage: ±10V, 0–10V, 1–5V, 0–5V Current: 0–20 mA, 4–20 mA, ±20 mA |
Resolution : | 16-bit (sigma-delta conversion) |
Data Format : | 16-bit two’s complement binary (proportional counts) |
Update Time : | 512 μs (all channels in parallel) |
Bandwidth : | 10 Hz |
Input Impedance : | 250 Ω (current), 500 kΩ (voltage typical) |
Overall Accuracy @ 25°C : | ±0.365% of full scale (typical; varies by range) |
Overall Accuracy 0–60°C : | ±0.642% of full scale (max) |
Backplane Current Consumption : | 35 mA @ 5V DC, 85 mA @ 24V DC |
Isolation : | 500V DC (field wiring to backplane) |
Common Mode Rejection : | 105 dB @ 60 Hz (typical) |
Normal Mode Rejection : | 55 dB @ 60 Hz (min) |
Terminal Block : | Removable |
Recommended Cable : | Shielded, Belden #8761 |
Maximum Wire Size : | #14 AWG |
Operating Temperature : | 0…60 °C (32…140 °F) |
Storage Temperature : | -40…+85 °C (-40…185 °F) |
Relative Humidity : | 5–95% non-condensing |
Compatibility : | SLC 500 chassis and processors |
Allen-Bradley 1746-NI4
Standard Part Number
- 1746-NI4
Alternate Part Number
- 1746-NIO4I
- 1746-NIO4V
Applications
Monitoring temperature sensors (RTDs, transmitters via signal converters)
Reading pressure transmitter signals in industrial processes
Measuring flow rates from flow transmitters
Monitoring tank levels using level sensors
Used in water and wastewater treatment systems
Monitoring analog signals in chemical and process industries
Used in HVAC systems for temperature and pressure control
Interfacing with 4–20 mA and 0–10V field devices
Monitoring speed or position signals from analog sensors
Used in energy management systems for analog measurements
Why Choose QTech Safety?
At QTech Safety, we’re more than just a safety supplier we’re your trusted partner in workplace protection and compliance.
Here’s why companies across UK and Ireland (EU) choose us for safety products and training:
- Comprehensive Range of Safety Equipment:
From gas detection and PPE to industrial safety tools, we offer one of the widest selections of trusted brands all at competitive Irish market prices. - Test & Measurement Instruments You Can Trust:
We supply a wide range of test and measurement instruments from the most leading and trusted brands, including industrial sensors, multimeters, oscilloscopes, accelerometers, proximity sensors, and other advanced measurement tools to support accurate diagnostics, condition monitoring, calibration, and maintenance applications. - Expert Health & Safety Training:
We provide professional health and safety training programmes designed to help your workforce stay compliant and confident on the job. - Fast, Reliable Delivery Worldwide:
Whether you’re in Texas United States or Perth Western Australia, our fast delivery service ensures you get your safety equipment quickly and efficiently. - Trusted by European Businesses:
We’re proud to support industries across Europe (UK) with certified safety solutions, expert advice, and responsive customer service.
We Ship Worldwide
At QTech Safety, we supply industrial safety products across Ireland and offer fast, reliable worldwide delivery. Through strong global logistics partnerships, we ensure efficient shipping and professional support for customers in Europe, North America and Australia.
🡆 Europe (United Kingdom, Ireland, Germany, France, Italy, Spain, and the rest of European Union)
🡆 Australia (Western Australia WA, Queensland QLD, and New South Wales NSW)
🡆 North America (United States, Canada, Mexico)
