Allen-Bradley 1756-RM2 ControlLogix Redundancy Module

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

In stock: 1 unit in Milwaukee, WI. Physically stocked and ready to ship or available for local pickup. Includes a 1-year full-function warranty.

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

Allen-Bradley 1756-RM2 ControlLogix Redundancy module (2nd generation) – Series A (1 of 5)

Actual NJT inventory photos

Price

$2,999.99USD

Unused surplus units available

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 same or next business day 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

Pick a condition and series below. UPS Ground shipping included.

Allen-Bradley 1756-RM2 ControlLogix Redundancy Module – Series A, New surplus (sealed)

Allen-Bradley 1756-RM2 ControlLogix Redundancy Module – Series A, New surplus (sealed), second photo

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

$2,999.99 USDIn-stock match

Condition: New surplus (sealed)

Series A

1 in stockView details

Variants

Part NumberConditionSeriesQtyPrice

1756-RM2 /A$2,999.99

New surplus (sealed) · Series A · 1 in stock

1756-RM2 /ANew surplus (sealed)Series A1$2,999.99 USD

1756-RM2

Refurbished — pick series, then request a quote

Series neededRequest Quote

1756-RM2RefurbishedSeries needed—Request Quote

Availability

1 unit in stock

Repairs

1756-RM2 Mail-In Repair Service

Estimated: $1,440.00

Part Number Decoder

ControlLogix Redundancy module (2nd generation)

1756RM2

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.

Series & Revisions

Series A in stock; other series on request.

Series notes: Logix keys on catalog number and firmware revision, not series; with the default Compatible Module keying, any series of the same catalog number is accepted in the slot.

Intended Use

Intended for high-availability redundant process control applications. Redundancy modules synchronize a primary and secondary ControlLogix chassis so a controller fault switches over without stopping the process, typical of water treatment, pharmaceutical, power and oil and gas installations where downtime is not acceptable.

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.

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

Can the 1756-RM2 be repaired?

Yes. NJT Automation repairs the 1756-RM2 by mail-in: diagnostic evaluation, component-level repair and a functional test, backed by a 1-year full-function warranty.

NJT managed repair. No evaluation fee; no repair, no charge. Prepaid UPS label both ways, $650 minimum, rush available. 1-year full-function warranty included, 2- and 3-year options.

Get a repair quoteor text photos and symptoms to (414) 331-5954

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Common 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

Related services:PLC Repair All Repair Services

Photos by NJT Automation; test videos from NJT or network repair technicians.

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 it 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. Factory-sealed, unused surplus stock in original packaging. May carry an older date code or series than current OEM production.

When does this part ship?

1 unit of the 1756-RM2 ControlLogix Redundancy module (2nd generation) are on the shelf in Milwaukee, WI, priced from $2,999.99. Orders before 5:00 PM Central on a business day ship the same day; next-day air is available at checkout.