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New Allen Bradley 1794-IR8 8-channel RTD Input Module in Stock

New Allen Bradley 1794-IR8 8-channel RTD Input Module in Stock

The Allen-Bradley 1794-IR8 is an 8-channel RTD input module from the FLEX I/O system, designed for high-precision temperature measurement in industrial automation. It accepts 2, 3, or 4-wire RTD sensors including Pt100, Pt200, Pt500, Ni100, Ni120, Ni200, Ni500, and Cu10, with 16-bit resolution and industry-leading accuracy.

  • رقم الصنف :

    1794-IR8

  • الطلب (الحد الأدنى للكمية) :

    1 Piece

  • قسط :

    EXW

  • منشأ المنتج :

    Singapore.

  • ميناء الشحن :

    Wuhan

  • مهلة :

    3~5 days

  • وزن :

    5kg

  • Product Details

     
     
    Specification Description
    Manufacturer Allen-Bradley / Rockwell Automation
    Model 1794-IR8
    Product Family FLEX I/O
    Product Type RTD Input Module
    Input Channels 8 (2 groups of 4, independently configurable) 
    Input Resolution 16 bits across 435 Ω 
    RTD Types Supported 100Ω Pt 385/3916, 200Ω Pt 385, 500Ω Pt 385, 100/200/500Ω Ni 618, 120Ω Ni 672, 10Ω Cu 427 
    Wiring Configuration 2, 3, or 4-wire RTD 
    Accuracy (Normal Mode) 0.05% Full Scale max 
    Accuracy (Enhanced Mode) 0.01% Full Scale typical 
    Temperature Range -200°C to +870°C (dependent on RTD type) 
    Common Mode Rejection -120 dB @ 60 Hz 
    Channel Bandwidth DC to 2.62 Hz (-3 dB) 
    Isolation Between user side and system side 
    Power Supply 24V DC (external, via terminal base) 
    FlexBus Current 20 mA 
    External DC Current 140 mA @ 24V DC 
    Power Dissipation 3W @ 31.2V DC 
    Operating Temperature -20°C to +55°C (-4°F to +131°F) 
    Dimensions (H x W x D) 46 x 94 x 53 mm (module only); 94 x 94 x 69 mm (installed) 
    Terminal Base Compatibility 1794-TB2, TB3, TB3S, TB3T, TB3TS 
    Configuration Software RSLogix 500 / Studio 5000 
    Lifecycle Status Active / Mature

    Related Product Model Recommendations

     
     
    Model Description Typical Application
    1794-IR8 (this model) 8-channel RTD input module Temperature measurement with RTD sensors 
    1794-IRT8 8-channel thermocouple/RTD/mV input module Multi-sensor temperature measurement 
    1794-IRT8XT Extreme environment version (-20°C to +70°C) Harsh industrial environments 
    1794-IE8 8-channel analog current/voltage input module Standard analog signal measurement 
    1794-IT8 8-channel thermocouple input module High-temperature thermocouple measurement 
    5094-IY8 Replacement module for 1794-IR8 Migration path for new installations 
    1794-TB3G Terminal base for 1794-IR8 Required mounting base for field wiring

    Payment & Delivery

    FAQs

    Q1: What RTD sensor types does the 1794-IR8 support?

    The module supports a wide range of RTD types including 100Ω Pt 385 (Euro), 100Ω Pt 3916 (US), 200Ω Pt 385, 500Ω Pt 385, 100Ω Ni 618, 200Ω Ni 618, 500Ω Ni 618, 120Ω Ni 672, and 10Ω Cu 427 . Each channel can be independently configured for different sensor types .

    Q2: What is the difference between normal mode and enhanced mode?

    Normal mode provides 0.05% full-scale accuracy with faster throughput (28-325 ms/channel). Enhanced mode improves accuracy to 0.01% typical and reduces gain drift to 10 ppm/°C, but at the cost of reduced throughput (56-650 ms/channel) . Enhanced mode is selected via a checkbox in the module configuration .

    Q3: What are common causes of incorrect readings on the 1794-IR8?

    Common causes include:

    • Incorrect wiring configuration: For 2-wire resistance measurement, do not jumper the negative terminal to COM—this creates a parallel path that interferes with readings 

    • Unconfigured module: A flashing green LED indicates the module is powered but not configured; a configuration block must be sent via BTW/BTR or COP instructions 

    • Wrong terminal base: Ensure the correct terminal base (1794-TB3/TB3S) is used with proper shield landing 

    Q4: How do I configure the module for RTD measurement?

    Configuration is performed using RSLogix 500 or Studio 5000 software. Key parameters include:

    • Sensor Type: Select specific RTD type (e.g., 100Ω Pt 385)

    • Data Format: Choose °C, °F, °K, or raw counts 

    • Notch Filter: Select appropriate filter frequency (10 Hz, 50 Hz, 60 Hz, etc.) for noise rejection 

    • RTD Loop Compensation: Select "Use Calibrated Values" for best accuracy, or specify 5/10/15Ω compensation 

    Q5: What is the maximum distance for RTD wiring?

    The 1794-IR8 supports 4-wire RTD connections for high-precision, long-distance measurements. Four-wire configuration eliminates lead resistance errors, making it suitable for remote temperature monitoring. For 3-wire RTDs, the module automatically compensates for lead resistance.

الكلمات المفتاحية الساخنة :

ألين برادلي 1794-IR8

وحدة FLEX I/O RTD

وحدة إدخال درجة الحرارة

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موضوع : New Allen Bradley 1794-IR8 8-channel RTD Input Module in Stock

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