Allen-Bradley 1771-IXHR Analog Input Module | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1771-IXHR is a high-resolution analog input module designed for the PLC-5 I/O chassis platform. It accepts thermocouple and RTD inputs, providing precise temperature measurement for demanding industrial process control applications. This page serves as a comprehensive selection guide to help engineers identify direct replacements, compatible equivalents, and upgrade paths.
Technical Specifications
- Part Number: 1771-IXHR
- Manufacturer: Allen-Bradley / Rockwell Automation
- Module Type: Analog Input — Thermocouple / RTD
- Platform: PLC-5 (1771 I/O System)
- Input Channels: 4 differential analog input channels
- Input Types: Thermocouple (J, K, E, T, R, S, B, N) and RTD (100Ω Pt, 200Ω Pt, 120Ω Ni)
- Resolution: 16-bit (high resolution)
- Accuracy: ±0.1% of full scale (typical)
- Backplane Current: 800 mA @ 5 VDC
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C
- Weight: Approx. 680 g
- Certifications: UL, CE, CSA
Compatible Replacement & Equivalent Models
When the 1771-IXHR is discontinued, obsolete, or unavailable, the following models are commonly evaluated as replacements. Always verify electrical and firmware compatibility before substitution:
- 1771-IXE — Allen-Bradley analog input module for thermocouple inputs; fewer channel options but same 1771 backplane.
- 1771-IR — Allen-Bradley RTD input module; direct RTD-only replacement candidate.
- 1756-IF8 (ControlLogix) — Rockwell’s modern platform equivalent; requires migration to ControlLogix chassis and updated programming.
- 1769-IT6 (CompactLogix) — Compact thermocouple/RTD input module; suitable for system modernization projects.
- Siemens 6ES7331-7PF11-0AB0 — Third-party cross-platform equivalent for thermocouple input; requires protocol adaptation.
- Wago 750-469 — Fieldbus-based thermocouple input module; suitable for distributed I/O architectures.
Note: Third-party equivalents may require additional configuration, wiring adaptation, or software changes. Consult your system integrator before substitution.
Why Choose the Original Model
- Proven Reliability: The 1771-IXHR has decades of field-proven performance in critical process industries.
- Native PLC-5 Integration: Plug-and-play compatibility with existing 1771 I/O chassis — no firmware changes required.
- High Resolution: 16-bit resolution ensures precise temperature measurement for tight process tolerances.
- Multi-Sensor Support: Supports both thermocouple and RTD types in a single module, reducing spare parts inventory.
- Regulatory Compliance: UL/CE/CSA certified for use in regulated manufacturing environments.
- Lowest Migration Risk: Retaining the original part eliminates re-programming, re-wiring, and re-validation costs.
Typical Applications
- Oil & gas process temperature monitoring
- Chemical and petrochemical plant control systems
- Food & beverage pasteurization and sterilization lines
- Pharmaceutical batch process control
- Power generation and utilities
- Automotive paint oven and curing systems
- HVAC and building automation with legacy PLC-5 infrastructure
System Compatibility
- Chassis: 1771 I/O chassis (all slot sizes)
- Processors: PLC-5/10, PLC-5/15, PLC-5/20, PLC-5/30, PLC-5/40, PLC-5/60, PLC-5/80
- Programming Software: RSLogix 5, PLC-5 Programming Terminal
- Communication: DH+, Remote I/O (RIO)
- Power Supply: 1771-P4, 1771-P4S, 1771-P7 (standard 1771 power supplies)
Not directly compatible with ControlLogix (1756) or CompactLogix (1769) chassis without an adapter or system migration.
Selection Guide
Use the following decision matrix to determine the right module for your application:
- Existing PLC-5 system, need exact replacement → 1771-IXHR (this module)
- PLC-5 system, RTD inputs only → Consider 1771-IR
- PLC-5 system, thermocouple only, lower budget → Consider 1771-IXE
- Planning migration to ControlLogix → 1756-IF8 with RSLogix 5000 reprogramming
- Planning migration to CompactLogix → 1769-IT6 with Studio 5000 reprogramming
- Distributed I/O / fieldbus architecture → Wago 750-469 or equivalent
- Cross-brand migration (Siemens S7) → 6ES7331-7PF11-0AB0 with full I/O remapping
Quality Assurance & Sourcing
- Sourcing: All units sourced from verified industrial distributors and authorized channel partners.
- Inspection: Each module undergoes visual inspection, label verification, and functional pre-shipment checks.
- Condition: New, refurbished (tested), and surplus stock available — condition clearly stated per listing.
- Warranty: 90-day replacement warranty on all units unless otherwise specified.
- Counterfeit Prevention: We do not source from unverified grey-market channels. Authenticity documentation available on request.
How to Order
- Confirm your chassis model and available slot type (single/double-wide).
- Verify your processor firmware version supports the 1771-IXHR module.
- Select quantity and condition (new / refurbished / surplus).
- Add to cart or contact us for bulk pricing and lead time.
- For urgent requirements, email support@konmask.com with your PO or RFQ.
Replacement & Compatibility FAQ
Q: Is the 1771-IXHR still in production?
A: The 1771-IXHR has been discontinued by Rockwell Automation. Konmask.com supplies verified surplus and refurbished stock to support legacy PLC-5 systems.
Q: Can I use a 1756-IF8 as a direct drop-in replacement?
A: No. The 1756-IF8 uses a different chassis (ControlLogix 1756 backplane) and requires full system migration including new chassis, power supply, processor, and RSLogix 5000 reprogramming.
Q: What is the difference between 1771-IXHR and 1771-IXE?
A: The 1771-IXHR offers higher resolution (16-bit) and supports both thermocouple and RTD inputs. The 1771-IXE supports thermocouple inputs only at lower resolution.
Q: Do you provide a certificate of conformance?
A: Yes. Certificate of conformance and inspection reports are available upon request for all orders.
Q: What is the lead time?
A: In-stock units ship within 1–3 business days. For out-of-stock items, typical lead time is 2–4 weeks depending on sourcing.
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