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The 1746-NI8 is an 8-channel analog input module for the SLC 500 series programmable logic controller (PLC) platform. It directly acquires continuous voltage or current signals from field transmitters and sensors, converting them into digital values for PLC processing.
Wide range of replacement power supplies, chassis, communications modules, I/O cards and accessories available
EtherNet I/P Adapter (1747-AENTR) available to convert an existing system to distributed I/O
Flexible options for Analogue and Digital I/O cards to modify and expand system capabilities
The 1746-NI8 module receives its power through the SLC 500 chassis backplane from the fixed or modular +5V dc/+24V dc chassis power supply. The +5V dc backplane supply powers the SLC circuitry, and the +24V dc backplane supply powers the module analog circuitry. The 1746-NI8 analog input module has multiclass interface capabilities. Class 1 is the standard configuration. The module can be configured through the user program for Class 3 which enables user-defined data scaling and monitoring of channel status words. The 1746-NI8 analog input module is tested to meet Council Directive 89/336/EEC Electromagnetic Compatibility (EMC).
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Allen Bradley 1746-NI8 SLC50x 8AI CURRENT/VOLTAGE MODULE Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Oil and Gas
Connects to multiple pressure transmitters and gas detectors to monitor pipeline pressure and combustible gas leaks.
Chemical Processing
Collects internal temperature, pressure, and material level data from batch reactors within explosion-proof zones.
Metals and Metallurgy
Connects to blast furnace thermocouples and load cells to monitor smelting temperature and raw material weight.
Pulp and Paper Industry
Aquires data from pulp tank consistency transmitters, dryer cylinder pressure sensors, and finished paper thickness gauges.
Pharmaceutical Industry
Monitors cleanroom micro-differential pressure transmitters, autoclave temperatures, and purified water system TOC levels.
Mining and Mineral Processing
Connects to crusher bearing temperature sensors, thickener mud level gauges, and slurry flowmeters.
First, configure DIP switches correctly—you must set the internal hardware switches for voltage or current before insertion, as incorrect settings cause data errors or resistor damage.
Second, prevent single-ended common-ground loops—all 8 channels share an internal analog common, so tie unused channels to COM and use signal isolators for multi-location devices to avoid potential differences.
Third, no hot-swapping—turn off chassis power completely before removing or installing the module.
The 1746-NI8 analog input module utilizes a high-precision analog-to-digital converter, providing a resolution up to 16-bit. In 4-20mA or 1-5V mode, the input digital value maps to a range of 3,277 to 16,384 (standard scaling) or 0 to 16,384 (variable scaling), allowing it to capture subtle signal changes.
The 1746-NI8 has a total of eight analog input channels.
Does the 1746-NI8 have any LED indicators?
Yes, the 1746-NI8 features a single green module status LED indicator on its front panel.
What cable does the 1746-NI8 require for wiring?
The 1746-NI8 recommends using a Belden 8761 shielded twisted-pair cable for each analog input loop.
Does the 1746-NI8 contain a terminal block?
Yes, the 1746-NI8 contains an 18-position, removable terminal block for field connections.
Do you offer global delivery services?
Yes. We ship globally, and we are able to quickly deliver parts globally to any corner of the world. Unless otherwise specified, we will ship your order via (DHL). We can also ship through FedEx, UPS, and TNT. We can also use your account.
How do I submit a part enquiry?
Our Product Pages – Simply search for the part number you require in our search bar, and it will take you straight to the product page. You can then email or call us – Speak directly to a dedicated Account Manager, who will be able to answer any questions you have and provide you with a quotation within minutes.
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Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
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