Product Details
Product Overview
The 1756-RM2XT provides high-speed data synchronization between primary and secondary chassis in a ControlLogix redundancy system. As an "XT" (Extended Temperature) module, it features specialized components to withstand harsher environmental conditions than standard automation hardware. This module ensures bumpless switchover during a controller or chassis failure, maintaining continuous process operation in mission-critical applications. We supply this unit as 100% Brand New original hardware, ensuring your high-availability architecture operates with factory-certified precision and thermal resilience.
Technical Specifications
The 1756-RM2XT utilizes advanced fiber optic technology to maintain real-time chassis synchronization:
| Parameter | Specification |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Module Type | Enhanced Redundancy Module (XT Series) |
| Fiber Optic Support | Single-channel (1) |
| Max Cable Length | 4 Kilometers |
| Wavelength | 1300 nm |
| Transmission Speed | 1000 Mbps (1 Gbps) |
| Operating Temp | -25°C to +70°C (-13°F to +158°F)* |
| Dimensions | 5.51 x 4.41 x 5.71 inches |
| Weight | 0.29 kg (0.64 lb) |
| Wire Size | 20 AWG (for grounding) |
Note: While standard specs list 0-60°C, the XT designation officially supports expanded ranges up to 70°C when installed in appropriate XT chassis.
Engineering Advantages
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Long-Distance Synchronization: The 1300 nm fiber optic interface supports cable runs up to 4 kilometers. This allows engineers to physically separate redundant chassis in different fire zones or remote control rooms to protect against localized disasters.
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Bumpless Switchover Performance: The 1000 Mbps (1 Gbps) transmission speed ensures near-instantaneous data mirroring. During a fault, the 1756-RM2XT facilitates a switchover so fast that the field actuators and remote I/O perceive no interruption in the control logic.
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Extended Thermal Durability: The XT-series construction utilizes robust internal components and superior heat dissipation designs. This solves the pain point of hardware failure in non-climate-controlled cabinets or extreme outdoor environments.
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Fiber Optic Isolation: By using fiber optics for chassis synchronization, the module provides total electrical isolation between redundant pairs. This eliminates ground loops and protects the control system from high-voltage surges or electromagnetic interference (EMI).
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Simplified Redundancy Setup: The module handles complex synchronization tasks automatically. Once connected via fiber, it manages the scan list and data table mirroring without requiring manual code-heavy synchronization routines from the programmer.
FAQs
Q: Can I use the 1756-RM2XT with a standard 1756-RM2 module?
A: No. For a redundant pair to function correctly, both modules must share the same hardware series and firmware revision. We recommend using two 1756-RM2XT modules to ensure consistent thermal performance and synchronization timing.
Q: What type of fiber optic cable does this module require?
A: The 1756-RM2XT requires 62.5/125 micron multi-mode fiber optic cable. Ensure you use high-quality LC-style connectors to maintain the 1000 Mbps transmission integrity over long distances.
Q: Does this module require a separate power supply?
A: No. The 1756-RM2XT draws its power directly from the ControlLogix backplane. However, you must ensure the chassis power supply (such as a 1756-PA75R) provides sufficient current for the entire redundancy set.
Q: Why should I choose the "XT" version over the standard 1756-RM2?
A: Choose the 1756-RM2XT if your installation site experiences temperatures outside the standard 0-60°C range. The XT version specifically targets applications in oil and gas, mining, and remote pumping stations where environmental control is limited.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
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