Allen-Bradley 1756-RM2 ControlLogix Redundancy Module – Ready to Ship

Name: Allen-Bradley 1756-RM2 ControlLogix Redundancy Module
Brand: Allen-Bradley
SKU: 1756-RM2
Price: 2999.99 USD
Availability: InStock

In stock: 1756-RM2 ControlLogix Redundancy module (2nd generation), Redundancy module, second generation: faster fiber link and support for 5570/5580 redundant systems. NJT Automation has 1 unit available in Milwaukee, WI, ready to ship or available for local pickup. Includes a one-year full-function warranty.

Allen-Bradley 1756-RM2 ControlLogix Redundancy module (2nd generation) – front view

$2,999.99USD

Request Repair QuoteEstimated $1,440.00

Part Number	1756-RM2
Description	ControlLogix Redundancy module (2nd generation). In stock in unused surplus condition, Series A.
Shipping	Ships today UPS Ground included \| Next-Day Air and Worldwide Shipping available at checkout
Pickup	Free local pickup at 2122 N Prospect Ave. Call ahead at (414) 331-5954.
Warranty	1-year full-function warranty provided by NJT Automation. Warranty details Included 1 year, full-function 2 years +15% of product price ($450.00) 3 years +25% of product price ($750.00) View full warranty policy
Returns	90-day free returns. View return policy
Exchange	Send us your defective 1756-RM2 after your purchase for a 10% core credit ($300). We also purchase old or damaged parts outright.

Replacement Options for 1756-RM2

In stock and ready to ship today

Allen-Bradley 1756-RM2 Unused surplus (new old stock) - Buy 1756-RM2 replacement | NJT Automation

Allen-Bradley 1756-RM2 Unused surplus (new old stock) - alternate view

Allen Bradley 1756-RM2 /A ControlLogix Redundancy Module - Sealed Surplus

$2,999.99 USDIn-stock match

Condition: Unused surplus (new old stock)

Series A

1 in stock

View Product

Availability

Similar Match Available

A similar unit is in stock and ready to ship once you confirm the condition you need.

Variants

Part NumberConditionSeriesQtyPrice

1756-RM2 /AUnused surplus (new old stock)Series A1$2,999.99 USD

1756-RM2RefurbishedSeries needed—Request Quote

Repairs

1756-RM2 Mail-In Repair Service

Estimated: $1,440.00

Part Number Decoder

ControlLogix Redundancy module (2nd generation)

1756RM2

Redundancy module, second generation: faster fiber link and support for 5570/5580 redundant systems.

1756: BulletinControlLogix: Rockwell Automation's chassis-based control platform (controllers, I/O, communication modules, power supplies and chassis).
RM2: Module codeRedundancy module, second generation: faster fiber link and support for 5570/5580 redundant systems.

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 DimensionsWeight0.62 lb (0.28 kg)H × W × D5.7 × 1.4 × 5.7 in. (145 × 35 × 145 mm)

Weight	0.28 kg (0.62 lb) Typical unit weight
Dimensions (H × W × D)	145 × 35 × 145 mm (5.7 × 1.4 × 5.7 in.) Single-slot module
Shipping Weight	0.81 kg (1.78 lb) Estimated: unit weight plus box and packing material; bills as 2 lb
Shipping Box (L × W × H)	12 × 12 × 8 in. (305 × 305 × 203 mm) Smallest standard box fitting the product with 3 in. cushioning per side

Product weight and dimensions are typical manufacturer-published values and may differ by series or option. Shipping box and weight are estimates for freight planning; the packed unit may ship in a different box.

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

1756-DHRIO Module code: Data Highway Plus / Remote I/O module
1756-HIST2G Module code: FactoryTalk Historian Machine Edition module with 2 GB
1756-OF8I Module code: 8-channel isolated analog output module

Allen Bradley Information

Technical Description

Redundancy module, second generation: faster fiber link and support for 5570/5580 redundant systems.

Alternate Part Numbers

1756RM2

Can the 1756-RM2 be repaired?

Yes. NJT Automation offers mail-in repair for the 1756-RM2, 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 1756-RM2 failures

Failure patterns we regularly see on ControlLogix Redundancy module (2nd generation) hardware like the 1756-RM2:

Partner communication lost: fiber transceiver failure on the module or a broken 1756-RMCx fiber cable
Redundancy pair will not synchronize (qualification fails) after a controller firmware change
Primary / secondary switchover during a power dip because the module faulted
OK LED red at power-up on one module of the pair

Repair or replace?

ReplaceA ControlLogix Redundancy module (2nd generation) holds little more than a network address, so a replacement 1756-RM2 drops in with almost no setup. Replace it when the network is down or the module is physically damaged. We stock the 1756-RM2. Order by 5:00 PM Central for same-day shipping.

RepairRepair makes sense on the 1756-RM2 when the failure is a connector, port or power-section fault on an otherwise sound board, or when you have several failing modules and want them returned as tested spares. Most 1756-RM2 units reach our bench with one of two symptoms: “Partner communication lost” or “Redundancy pair will not synchronize (qualification fails)”. Already swapped it out? Repairing the failed 1756-RM2 turns it into a tested spare on the shelf for the next failure. Expect estimated $1,440.00 for the 1756-RM2 repair, with full-function testing and a 1-year warranty included.

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 1756-RM2?

The Allen-Bradley 1756-RM2 is a ControlLogix Redundancy module (2nd generation): Redundancy module, second generation: faster fiber link and support for 5570/5580 redundant systems.

What condition is the 1756-RM2 in?

NJT Automation currently has 1 unit of the 1756-RM2 in stock in unused surplus condition (Series A). Each listing states its own condition and series. Typically unused surplus or new/open-box stock. Packaging may be opened or replaced, but the module itself has no meaningful run time.

When does this part ship?

NJT Automation has 1 unit of the 1756-RM2 ControlLogix Redundancy module (2nd generation) on the shelf in Milwaukee, WI, priced from $2,999.99. Orders placed before 5:00 PM Central on business days ship the same day; orders placed after the cutoff ship the next business day.

Can you ship this next-day air?

Yes. UPS Next Day Air is available at checkout for the 1756-RM2 ControlLogix Redundancy module (2nd generation). 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. Free local pickup is available for the 1 in-stock 1756-RM2 unit at NJT Automation, 2122 N Prospect Ave, Milwaukee, WI, during business hours. Contact us to arrange a pickup time.