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      Allen-Bradley 1756-RM2XT
      · Product image is representative; revision or series may vary. Contact us to request a specific version.
      Ships by Thursday, September 17

      1756-RM2XT

      ControlLogix-XT fiber redundancy module

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          PRODUCT DESCRIPTION

          Extended-temperature redundancy for paired ControlLogix-XT chassis

          Allen-Bradley 1756-RM2XT connects the partner chassis of a ControlLogix-XT redundant controller system through fiber-optic communication. Its two optical ports support a second communication path when redundant cabling is installed, while the XT design supports operation from -25 to +70 degrees Celsius.

          Install the redundancy modules in corresponding slots and confirm compatible hardware, controller firmware and redundancy software before qualification. Use the specified XT chassis and power supply, protect unused optical ports, and verify synchronization and switchover under the applicable Rockwell Automation procedures before returning equipment to service.
          BEFORE YOU BUY

          Confirm the complete installed configuration

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          ACTUAL APPLICATIONS

          Redundant control with compatible ControlLogix-XT equipment

          The following roles describe the documented redundancy architecture, not claims that this exact catalog number is installed at a named customer site. Controller support and system qualification remain configuration dependent.
          • 01 · Controller availability

            Paired controller chassis

            The module connects partner chassis and supports the redundancy operations needed to qualify and synchronize a compatible controller pair before a controlled switchover.
          • 02 · Communication resilience

            Independent fiber paths

            When the second optical channel is cabled, the redundancy link has an additional communication path. Separate cable routing reduces the chance of one physical incident damaging both paths.
          • 03 · Extended environments

            XT control cabinets

            Within a suitably protected control enclosure, the XT module provides the redundancy connection for a compatible extended-temperature controller installation. Verify the ratings of every installed component, not only this module.

          Technical specifications for 1756-RM2XT

          • Product Model
            1756-RM2XT
          • Product Parameters
            ControlLogix-XT fiber redundancy module
          • In stock
            1 unit
          • Manufacturer
            Allen-Bradley
          • Optical ports
            2
          • Transmission rate
            1000 Mbps
          • Connector interface
            LC duplex
          • Fiber specification
            8.5/125 micrometre single-mode
          • Maximum optical link
            10 km; verify optical power budget
          • Optical wavelength
            1310 nm
          • Backplane consumption
            1.16 A at 5.1 V DC; 3.4 mA at 24 V DC
          • Maximum power dissipation
            6 W
          • Operating temperature
            -25 to +70 degrees Celsius
          • Storage temperature
            -40 to +85 degrees Celsius
          • Relative humidity
            5-95%, noncondensing
          • Chassis compatibility
            1756-A7XT or 1756-A10XT
          • Standard power supplies
            1756-PAXT or 1756-PBXT
          • Slot requirement
            One chassis slot; corresponding slot in partner chassis
          View all additional
          View as PDF Ask for Quote

          Alternative Names

          ControlLogix-XT redundancy module 1756 RM2XT fiber redundancy Allen-Bradley extended-temperature redundancy module
          SYSTEM & REPLACEMENT CHECK

          Information needed before ordering

          Three direct checks to secure your system integration and minimize ordering risks.

          Information

          System integration Replacement check Manuals & support
          CONTROLLOGIX-XT REDUNDANCY

          Check the complete partner-chassis configuration

          Use the module within a supported ControlLogix redundant controller architecture. Hardware and firmware compatibility must be checked for the complete partner pair before the redundancy system is qualified.
          Install the redundancy modules in matching slots of the two chassis. For this XT model, use the documented XT chassis and approved power supply rather than assuming any 1756 chassis is equivalent.
          Connect the optical link directly between the redundancy modules. Check connector condition, fiber type and optical power budget, and protect any unused ports as required for the specified operating environment.

          Features:

          • Corresponding slots in partner chassis
          • Compatible controller and redundancy firmware
          • Protected single-mode fiber connections
          The Allen-Bradley 1756-RM2XT requires hardware, firmware and optical-link checks before system integration and commissioning.
          INTERCHANGEABILITY

          Verify the complete replacement identity before commissioning

          Rockwell Automation currently identifies 1756-RM2XT as Active Mature and indicates that a replacement is available. The reviewed public page does not establish a discontinuation date or an unconditional replacement order number.
          Before changing a module, document the partner hardware, supported firmware bundle and chassis configuration. A similar-looking catalog number does not establish equivalent temperature ratings or redundancy compatibility.
          Apply the relevant power-isolation and handling procedures, then verify status, qualification and synchronization. Perform the documented switchover checks before returning the controller system to normal operation.

          Features:

          • Confirm the full catalog number and XT requirement
          • Check the supported redundancy firmware bundle
          • Validate synchronization and switchover after service
          The Allen-Bradley 1756-RM2XT requires replacement verification against the complete installed configuration and current manufacturer documentation.
          DOCUMENTATION STATUS

          Browse the Manuals, Datasheets, Official Documents, Links

          Important Notice: Amikon is an independent supplier. Consult the applicable Rockwell Automation documentation and installed configuration before selection, installation or replacement.

          Features:

          • Exact-model reference documents
          • Hardware and system compatibility checks
          • Accessories are supplied only when listed in the quotation
          Documentation for the Allen-Bradley 1756-RM2XT supports document applicability checks before installation or replacement.

          Also searched as

          1756-EN2TXT 1756-L75 1756-A17/A 1756-L1M1/A 1756-PA72/C

          Important notice

          Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
          This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
          BUYER INFORMATION

          Commercial terms without hidden steps

          Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
          • 01

            Shipping & delivery

            Dispatch
            Eligible stock: same / next day
            Carriers
            DHL, FedEx or UPS
            Ship from
            Xiamen, China
            Packed size
            Packed dimensions unconfirmed
            Shipping weight
            Gross weight unconfirmed
          • 02

            Payment & customs

            Payment
            Bank transfer (T/T)
            Currencies
            USD · EUR · GBP · RMB
            Credit cards
            Not accepted
            HS reference
            Classification unconfirmed
            Origin
            United States of America
          • 03

            Warranty & returns

            Warranty
            12 months from AMIKON
            Inspection
            Label, condition and packing checks
            Returns
            Prior RMA authorisation required
            Compatibility
            Confirm before order
            OEM warranty
            Does not apply
          Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.

          • Part checked

            Full suffix recorded

          • Condition checked

            Label and appearance

          • Packing checked

            Antistatic protection

          • Tracking supplied

            Established couriers

          • Sandy Lin

            Dedicated account manager · 15+ years
          FREQUENTLY ASKED QUESTIONS

          Questions buyers ask about 1756-RM2XT

          Direct answers about identity, compatibility, stock, warranty, payment and shipping.

          • Does 1756-RM2XT require a module in both chassis?

            Yes. Install one redundancy module in each chassis. The partner redundancy modules must occupy corresponding slot positions and use a supported hardware and firmware combination.

          • Can the two fiber channels share the same cable route?

            Rockwell Automation recommends routing redundant cables so that damage to one does not also damage the other. Avoid sharp bends and protect the fiber against abrasion and mechanical damage.

          • Which fiber specification is required?

            Use the documented LC duplex single-mode connection. The installation instructions specify 8.5/125 micrometre fiber and a maximum link length of 10 km, subject to the optical power budget.

          • Can 1756-RM2XT be installed in a standard non-XT chassis?

            The installation instructions require XT modules to use an XT chassis. The technical-data table lists 1756-A7XT and 1756-A10XT for 1756-RM2XT.

          • Why will a redundancy pair not qualify?

            Incompatible hardware or firmware, or redundancy modules in different corresponding slots, can prevent qualification. Check partner compatibility and module status using the applicable redundancy manual before changing the system.

          • Is 1756-RM2XT discontinued?

            The manufacturer product page reviewed on 7 September 2026 lists Active Mature and Replacement Available, not a confirmed discontinuation date. A replacement must be checked against the installed system; no universal drop-in replacement is asserted here.
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