Product Details
Product Overview
The Allen Bradley 1771-IXHR provides high-precision temperature and millivolt sensing for legacy PLC-5 control systems. This module interfaces directly with various thermocouple types and millivolt sources, converting low-level analog signals into high-resolution digital data. We supply this unit as 100% Brand New original stock, featuring a factory-applied conformal coating to ensure long-term stability in corrosive or high-humidity industrial atmospheres.
Technical Specifications
The 1771-IXHR utilizes a high-speed backplane interface to deliver precise thermal telemetry across eight channels.
| Feature | Specification |
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Module Type | High-Resolution Thermocouple / Millivolt Input |
| Number of Inputs | 8 Floating Differential Channels |
| Resolution | 15 Bits + Sign (1.0°C or 1.0°F per bit) |
| Channel Update Rate | 25 ms for all 8 channels |
| Voltage Range | $\pm$99.99 mV |
| Thermocouple Types | Type B, E, J, K, R, S, T |
| Data Format | Natural Binary |
| Backplane Current | 750 mA |
| Wiring Arm | 1771-WH |
| Protective Coating | Conformal Coated |
| Mounting | Rack Mountable (1771 Universal Chassis) |
Engineering Advantages
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Ultra-Fast Thermal Response: With a channel update rate of 25 ms for all eight inputs, the 1771-IXHR captures rapid temperature fluctuations that standard analog modules might miss. This speed enables tighter PID control loops in high-precision heat treatment and chemical reaction processes.
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Floating Differential Inputs: The module employs eight floating differential inputs to reject common-mode noise. This architecture prevents ground loops and electrical interference from distorting sensitive millivolt signals, even in environments with heavy motor switching or high-frequency induction.
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Corrosion Resistance: The factory conformal coating protects internal circuitry against airborne contaminants, moisture, and chemical vapors. This hardware hardening makes the 1771-IXHR an ideal choice for wastewater treatment, oil and gas, and pulp and paper facilities.
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High-Resolution Accuracy: The 15-bit plus sign resolution ensures precise data conversion, translating to 1.0 degree per bit. This granularity allows the PLC-5 processor to make minute adjustments to fuel-to-air ratios or cooling valves, maximizing energy efficiency and product consistency.
FAQs
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What thermocouple types does the 1771-IXHR support?
The module supports a wide array of industrial standards, including Type B, E, J, K, R, S, and T thermocouples. It also accepts direct $\pm$99.99 mV signals for non-standard sensing applications.
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Does this module require an external power supply for the field side?
No. The 1771-IXHR draws its required 750 mA operating current directly from the 1771 backplane. This reduces wiring complexity and saves space in the remote I/O chassis or local rack.
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Can I hot-swap this module during operation?
While the 1771 chassis supports "Removal and Insertion Under Power" (RIUP), you must exercise caution to prevent system glitches. Always verify that your PLC-5 program handles I/O faults gracefully before removing the module from a live backplane.
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Why should I choose the "IXHR" version over standard thermocouple modules?
The "IXHR" variant offers significantly higher resolution (15-bit) and faster update times compared to standard 1771-IX units. Furthermore, the standard conformal coating provides an extra layer of protection for legacy systems operating in harsh or aging facilities.
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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Comprehensive Guide to PLC Types in Modern Industrial Automation
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Demystifying the DDE Protocol in Legacy Industrial Automation Systems
Modern control systems rely heavily on seamless interprocess communication to exchange operational data between software programs. Microsoft first introduced the Dynamic Data Exchange (DDE) protocol in 1987 to enable real-time data sharing. In factory automation, DDE served as an early bridge between control software and Windows desktop applications. Therefore, understanding DDE mechanics provides crucial insights into how legacy industrial networks established software-level connectivity.