Allen-Bradley 1756-L63XT ControlLogix-XT Logix5563 Processor | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1756-L63XT is a ControlLogix-XT (Extreme Temperature) series programmable logic controller (PLC) processor manufactured by Rockwell Automation. Rated for operation in harsh ambient environments from −25 °C to +70 °C, it is the ruggedized variant of the standard 1756-L63 Logix5563 processor and is designed for integration into the ControlLogix 1756 chassis-based control system.
Buyers searching for a 1756-L63XT replacement, a Logix5563 equivalent, or a ControlLogix-XT substitute often need to evaluate multiple sourcing paths—original Rockwell parts, certified refurbished units, or functionally equivalent alternatives—before committing to a procurement decision. This guide consolidates that information to accelerate your selection process.
Technical Specifications
| Part Number | 1756-L63XT |
| Series | ControlLogix-XT (Extreme Temperature) |
| Processor | Logix5563 |
| User Memory | 8 MB (program + data) |
| I/O Capacity | Up to 128,000 I/O points |
| Communication Ports | 1 × USB (programming), backplane via 1756-XT chassis |
| Operating Temperature ⚠️ Key for Replacement | −25 °C to +70 °C |
| Storage Temperature | −40 °C to +85 °C |
| Humidity | 5–95% non-condensing |
| Vibration | IEC 60068-2-6 compliant |
| Shock | IEC 60068-2-27 compliant |
| Power Supply | Via 1756-XT chassis backplane |
| Firmware | Compatible with Studio 5000 Logix Designer |
| Certifications | UL, CE, cUL |
| Weight | Approx. 360 g |
⚠️ The extended temperature rating (−25 °C to +70 °C) is the single most critical parameter when evaluating any replacement. Standard ControlLogix processors are only rated to +60 °C and are not drop-in substitutes in XT-rated installations.
Compatible Replacement & Equivalent Models
1. Direct Drop-in Replacements
These units share the same form factor, firmware compatibility, and XT temperature rating. No program changes are required.
- 1756-L63XT (new / factory-sealed) — identical OEM part, sourced through authorized Rockwell distributors or certified secondary-market suppliers such as Konmask.
- 1756-L63XT Series B / C — later hardware revisions; verify firmware version compatibility with your existing project file before installation.
2. Functional Equivalents
These models offer comparable processing power and memory but may require chassis, firmware, or program migration. Confirm XT temperature rating before use in extreme-temperature applications.
- 1756-L73XT — Logix5573 processor, 8 MB user memory, same XT chassis; higher task-execution performance. Suitable upgrade path when additional throughput is needed.
- 1756-L83E — standard temperature range only (0–60 °C); not suitable as a direct XT replacement without environmental re-assessment.
- 1756-L85E — 32 MB memory, EtherNet/IP port integrated; requires chassis and firmware migration; standard temperature only.
3. Cross-Brand Alternatives
For applications where Rockwell platform lock-in is not a constraint, the following platforms offer comparable functionality. Full system re-engineering (I/O mapping, HMI, SCADA integration) is required.
- Siemens SIMATIC S7-400H — high-availability PLC with wide temperature options; widely used in process industries.
- Schneider Electric Modicon M580 — Ethernet-native PAC; evaluate temperature-rated variants for harsh environments.
- Mitsubishi MELSEC iQ-R Series — modular PLC with extended temperature options; strong in Asian manufacturing markets.
⚠️ Cross-brand migration requires full engineering review. Contact Konmask for a compatibility assessment before proceeding.
Why Choose the Original 1756-L63XT Model
- Certified Extreme Temperature Performance: Factory-validated for −25 °C to +70 °C; no field derating or additional thermal management required.
- OEM Firmware Compatibility: Seamless integration with Studio 5000 Logix Designer; no firmware workarounds or version conflicts.
- Backplane & Chassis Compatibility: Designed exclusively for the 1756-XT chassis ecosystem; guaranteed electrical and mechanical fit.
- Regulatory Certifications: UL, CE, and cUL listings maintained; critical for installations subject to third-party safety audits.
- Rockwell Technical Support: Full access to Rockwell Automation TechConnect support, firmware updates, and lifecycle management.
- Warranty & Traceability: Konmask-supplied units include documented sourcing traceability and a minimum 12-month warranty against manufacturing defects.
Typical Applications
- Oil & Gas: Wellhead control panels and pipeline SCADA systems operating in sub-zero or high-ambient outdoor enclosures.
- Mining: Conveyor and crusher control systems in open-pit or underground environments with extreme temperature swings.
- Steel & Metals: Furnace area automation where ambient temperatures near control cabinets exceed standard PLC ratings.
- Water & Wastewater: Remote pump station controllers in unheated outdoor enclosures subject to seasonal temperature extremes.
- Chemical Processing: Hazardous-area control systems requiring ruggedized hardware with certified temperature performance.
- Transportation Infrastructure: Tunnel ventilation and rail signaling control in environments without climate-controlled enclosures.
System Compatibility
The 1756-L63XT operates within the ControlLogix-XT platform. Key compatible components include:
- 1756-A7XT / 1756-A10XT / 1756-A13XT / 1756-A17XT — XT-rated chassis (7, 10, 13, 17 slots)
- 1756-PA75R / 1756-PB75R — XT-rated redundant power supplies (120/240 VAC and 18–32 VDC)
- 1756-EN2TR — EtherNet/IP communication module with DLR support
- 1756-CN2R — ControlNet communication module (redundant media)
- 1756-DNB — DeviceNet scanner module
- 1756-IB16 / 1756-OB16E — standard digital I/O modules (verify XT rating for extreme-temp slots)
- 1756-IF8 / 1756-OF8 — analog I/O modules for process signal conditioning
Selection Guide
Answer these three questions before finalizing your procurement decision:
-
Does your installation environment exceed +60 °C ambient?
If yes, only XT-rated processors (1756-L63XT or 1756-L73XT) are suitable. Standard ControlLogix processors are not a valid substitute. -
Is your existing program compiled for Logix5563 firmware?
If yes, a direct 1756-L63XT replacement requires no program changes. Upgrading to a Logix5573 (1756-L73XT) may require firmware migration and re-validation. -
Do you require OEM certification documentation for your audit trail?
If yes, contact Konmask to request Certificate of Conformance, test reports, and sourcing documentation prior to purchase.
📩 Not sure which model fits your system? Contact Konmask at support@konmask.com — our engineers will review your application and recommend the correct part within 24 hours.
Quality Assurance & Sourcing
Konmask sources the 1756-L63XT through verified channels including authorized distributors, OEM surplus, and certified secondary-market suppliers. Every unit undergoes a 4-step inspection process before shipment:
- Visual Inspection: Housing integrity, label authenticity, connector condition, and absence of counterfeit indicators.
- Firmware Verification: Firmware version confirmed and documented; compared against Rockwell published release notes.
- Functional Power-On Test: Unit powered in a 1756-XT chassis; self-diagnostics passed and communication verified.
- Documentation Package: Sourcing traceability record, inspection report, and warranty certificate issued with each unit.
Available documentation upon request: Certificate of Conformance (CoC), Inspection Report, Sourcing Declaration, Warranty Certificate.
How to Order
- Submit Your Inquiry: Email support@konmask.com or call +0086 19859288691 with your part number, required quantity, and delivery timeline.
- Receive Quotation & Documentation: Konmask will respond within 24 hours with pricing, lead time, and available documentation.
- Confirm & Ship: Upon order confirmation, units are inspected, packaged, and dispatched with full traceability documentation.
Replacement & Compatibility FAQ
Q1: Can the standard 1756-L63 replace the 1756-L63XT?
No. The standard 1756-L63 is rated for 0 °C to +60 °C only. It is not a compatible substitute for the 1756-L63XT in installations where ambient temperatures exceed +60 °C. Using a non-XT processor in an XT-rated application voids certifications and risks equipment failure.
Q2: Is the 1756-L73XT a functional equivalent to the 1756-L63XT?
Functionally yes—both are XT-rated ControlLogix processors compatible with the same chassis. The 1756-L73XT (Logix5573) offers higher task-execution performance and the same memory capacity. A firmware migration and program re-validation are required before substitution.
Q3: Can Konmask supply a 1756-L63XT equivalent with full documentation for an audit?
Yes. Konmask provides sourcing traceability, Certificate of Conformance, functional test reports, and warranty certificates for all supplied units. Contact support@konmask.com to request a documentation package before purchase.
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