Allen-Bradley 1746-NR4 SLC 500 4-channel

Allen-Bradley 1746-NR4 SLC 500 RTD input module: 4-channel RTD / resistance input (Pt, Ni, Cu, 2/3/4-wire), 16-bit, 1746 chassis mount. NJT Automation sources the 1746-NR4 on request; send the part number for a replacement or repair quote.

Quote required. Request a quote below for pricing and delivery.

Allen-Bradley 1746-NR4 SLC 500 RTD input module, 4-channel – front view

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Part Number	1746-NR4
Price	On Request Previously sold for $199.99 USDAvailability and condition determine final quote.
Description	SLC 500 RTD input module, 4-channel.
Shipping	UPS Ground included \| Next-Day Air and Worldwide Shipping available at checkout
Warranty	1-year full-function warranty provided by NJT Automation. Warranty details Included 1 year, full-function 2 years +15% of product price ($30.00) 3 years +25% of product price ($50.00) View full warranty policy
Returns	90-day free returns. View return policy
Exchange	Send us your defective 1746-NR4 after your purchase for a 10% core credit. We also purchase old or damaged parts outright.

Availability

Available Level 1

This part is available through our Level 1 supplier network. Request a quote to confirm quantity, price, and next-day shipping options.

Inventory Level 1 RFQ

Level 1 parts come from vetted US suppliers we have worked with for years. Each unit is checked before it ships, so counterfeits, repackaged items sold as new, and worn-out equipment do not reach you. Every part carries the same NJT warranty and return policy as our own stock.

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Repairs

1746-NR4 Mail-In Repair Service

How the Process Works:

Submit Your RFQ: Complete the request-for-quote (RFQ) form with your exact requirements.
Receive a Quote: We respond ASAP - within 1 hour during business hours.
Approve and Pay: Agree to the quoted price, and we will issue an invoice payable via credit card or your preferred method.
Direct Shipping: Our normal shipping time is 3-5 business days, during which we thoroughly inspect and certify items to meet our high standards. If you request next-day air delivery, the item will be sent directly to you and arrive the following business day. Please note: These items are NOT available for local pickup at NJT Automation's location.

What We Offer

We source genuine parts from trusted U.S. channels and stand behind what we sell.

Our network has millions of parts ready to be delivered now.
Complete Transparency: Clear information on item availability.
Well-vetted components from trusted suppliers sourced from the USA.
Technical Support: Assistance, troubleshooting and hardware repairs.
Minimal Markup: The best sourcing service at a minimal cost.
Quick Delivery: Fast access to the parts you need to get your machines back up and running.
Dropship available • No branding on packaging

Part Number Decoder

SLC 500 RTD input module

1746NR44

SLC 500 RTD input module: 4-channel RTD / resistance input (Pt, Ni, Cu, 2/3/4-wire), 16-bit, 1746 chassis mount.

1746: BulletinSLC 500 I/O bulletin: chassis, power supplies and I/O modules for the SLC 500 modular system (processors are bulletin 1747).
NR4: Module typeRTD input module: 4-channel RTD / resistance input (Pt, Ni, Cu, 2/3/4-wire), 16-bit.
4: Channel count4-channel module.

Decoded from the Rockwell Automation catalog-number structure. Series and firmware revision are printed on the product label, not encoded here.

Physical Data

Weight and DimensionsBox10 × 8 × 6 in.

Shipping Box (L × W × H)	10 × 8 × 6 in. (254 × 203 × 152 mm) Most common box recorded for this catalog number

Shipping box and weight are recorded from previous shipments of this catalog number and are provided for freight planning.

Datasheet

Datasheet available for download

Generated from product specifications; not an official Allen-Bradley datasheet. For an official datasheet, contact Allen-Bradley or an authorized distributor.

Similar Part Numbers

1746-NO4I Module type: Analog output module

Allen Bradley Information

Lifecycle: Discontinued. Verify current status with the manufacturer.

Alternate Part Numbers

1746NR4

Previously sold 1746-NR4

1 sold

NJT Automation has supplied and shipped one 1746-NR4 SLC 500 RTD input module in 2026; request a quote and we will source another from our supplier network.

Sold: 1 in 2026
Price: $200
Series: B × 1

The one 1746-NR4 SLC 500 RTD input module sold in 2026 was used and went for $200.

Sold

Allen Bradley 1746-NR4 /B SLC 500 RTD/Resistance Input Module 1746NR4

$199.99 USD

Used

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Can the 1746-NR4 be repaired?

Yes. NJT Automation offers mail-in repair for the 1746-NR4, including diagnostic evaluation, component-level repair, and functional testing.

NJT Managed Repair

One vendor. One warranty. NJT manages the entire process.

1-year full-function NJT warranty, with 2- and 3-year options available
Rush service available for production-critical repairs
No evaluation or diagnostic charges
No repair, no charge
"Unrepairable" is not an option
Pre-paid UPS shipping label provided for sending your unit in
$650 minimum repair charge, shipping included both ways

Get an NJT Repair Quote

Looking for another option? For lower-cost repairs or if you prefer to work directly with an independent repair specialist, compare bids through RepairMode. RepairMode providers operate independently and set their own pricing and warranty terms.

Find a PLC repair specialiston RepairMode.com ↗

Common 1746-NR4 failures

Failure patterns we regularly see on SLC 500 RTD input module hardware like the 1746-NR4:

Channel drift, offset or a reading railed at full scale after overvoltage on the field loop
Calibration lost on one or more channels
Output channel stuck at zero or full scale (NO / NIO modules)
RTD / thermocouple channels reading wrong from a failed reference or CJC (NR / NT)
Noisy readings from a damaged filter section

Repair or replace?

ReplaceReplace the 1746-NR4 when a channel reads open, pegged, or drifting and the loop cannot wait. The SLC 500 RTD input module only carries its channel settings, and those download from the project. Stick with the exact 1746-NR4. The suffix sets the 4-channel density, so a near match is a different unit. A replacement 1746-NR4 is sourced on request, so compare its lead time with a repair before deciding.

RepairAnalog cards are worth repairing because the failure is usually one channel's front end or an isolated supply, and the repair includes recalibration of every channel. Choose repair for the 1746-NR4 when replacements are hard to find or the card is one of several the same age. Most 1746-NR4 units reach our bench with one of two symptoms: “Channel drift, offset or a reading railed at full scale” or “Calibration lost on one or more channels”. Already swapped it out? Repairing the failed 1746-NR4 turns it into a tested spare on the shelf for the next failure. Each 1746-NR4 we repair goes back function-tested with a 1-year warranty.

Request a Repair Quote

Text photos of the faulty unit and the symptoms to (414) 331-5954.

Start Your Repair Today

Related services:PLC Repair All Repair Services

All product photos were taken by NJT Automation. Test videos originated from either NJT Automation internally or from repair technicians within our network.

Still have questions?

Find answers to shipping, warranties, repairs, and more.

Frequently Asked Questions

What is the 1746-NR4?

The Allen-Bradley 1746-NR4 is an SLC 500 RTD input module: 4-channel RTD / resistance input (Pt, Ni, Cu, 2/3/4-wire), 16-bit, 1746 chassis mount.

What condition is the 1746-NR4 in?

The 1746-NR4 is available in Unused surplus / Refurbished / Used condition. We can quote this part in unused surplus, refurbished, or used condition depending on availability and your preference. Specify your requirement in the RFQ.

When does this part ship?

This 1746-NR4 is sourced on request, so sourcing and quote timelines apply. Request a quote and we'll confirm availability and lead time. Many parts can be sourced within a few business days through our Level 1 supplier network.

Can you ship this next-day air?

Yes. UPS Next Day Air is available at checkout for the 1746-NR4 SLC 500 RTD input module. Place your order before 5:00 PM Central on a business day and your in-stock item ships the same day for next-business-day delivery.

Can I pick this item up locally?

Yes. Once your 1746-NR4 has been sourced and is ready, free local pickup is available at NJT Automation, 2122 N Prospect Ave, Milwaukee, WI, during business hours.

How many I/O points does the 1746-NR4 have?

4-channel module.