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Allen-Bradley 1794-IE8H FLEX I/O HART Analog Input Module
Allen-Bradley 1794-IE8H FLEX I/O HART Analog Input Module
Brand/Manufacturer: Allen-Bradley
Order Number: 1794-IE8H
Type: Analog Input Modules
Country of Origin: USA
Condition: Original Brand
Lead Time: Available in stock
Payment Term: 100% TT In Advance
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Description
The 1794-IE8H is an 8-channel analog input module engineered by Allen-Bradley for the FLEX I/O distributed system. Designed with native Highway Addressable Remote Transducer (HART) protocol capability, it enables simultaneous process variable measurement and digital communication with smart field instruments. The open-style module mounts onto compatible terminal bases on DIN rails, delivering precision process data to host controllers via FLEX I/O communication adapters.
Analog Channel Configuration and HART Integration
The module features 8 single-ended, non-isolated input channels supporting current and voltage signal ranges (such as 4–20 mA, 0–20 mA, ±10V, and 0–10V) digitized via a 16-bit successive approximation analog-to-digital converter. Its built-in HART modem multiplexes digital diagnostic and configuration data over the analog loops without requiring external multiplexer hardware. This configuration streamlines system wiring for transmitters, flow meters, and analytical sensors.
Terminal Base Compatibility and Power Requirements
Operation requires an external 24 VDC nominal power supply (ranging from 19.2 to 31.2 VDC) and a dedicated terminal base, specifically the 1794-TB3G or 1794-TB3GS. These specialized terminal bases provide the grounding and shielding architecture necessary to maintain signal integrity and prevent ground loops in noisy industrial environments. The module supports Removal and Insertion Under Power (RIUP), allowing maintenance personnel to replace units without powering down the entire I/O rack.
| Parameter | Specification |
|---|---|
| Model | 1794-IE8H |
| Brand | Allen-Bradley (Rockwell Automation) |
| Series | FLEX I/O (Bulletin 1794) |
| Product Type | HART Analog Input Module |
| Number of Inputs | 8 single-ended, non-isolated channels |
| Input Signal Ranges | 4–20 mA, 0–20 mA, ±10V, 0–10V |
| Resolution | 16-bit A/D conversion |
| Communication Protocol | HART enabled |
| External DC Power Supply | 24 VDC nominal (19.2...31.2 VDC) |
| FlexBus Current | 80 mA at 5 VDC |
| Absolute Accuracy | ±0.1% full scale at 20 deg C |
| Recommended Terminal Base | 1794-TB3G or 1794-TB3GS |
| Mounting Options | 35 mm DIN rail mount |
| Enclosure Rating | Open style / IP20 |
| Operating Temperature | 0 °C to 55 °C (32 °F to 131 °F) |
| Weight | 0.70 lbs (0.32 kg) |
Frequently Asked Questions
Q: What terminal bases must be used with the 1794-IE8H module?A: The 1794-IE8H requires either the 1794-TB3G or 1794-TB3GS terminal base, which includes specialized grounding connections to support HART signal shielding.
Q: Does the 1794-IE8H isolate individual input channels from one another?A: No, the 8 input channels are single-ended and non-isolated from each other, though a basic 50 V continuous isolation barrier is maintained between the field side and the system.
Q: How does the module communicate HART data from field instruments?A: The module integrates an internal HART modem that extracts digital diagnostic variables and device parameters directly from the 4–20 mA analog loops, passing the data through the FLEX I/O backplane to the controller.
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Testimonials
Fast Delivery, Excellent Quality
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- Sarah Johnson
We’ve worked with IndustriaX Limited on several urgent orders for automation components. Their ability to provide original, factory-sealed parts with full documentation—often from in-stock inventory—has significantly reduced our downtime. The delivery is consistently fast, and their logistics team is highly responsive. IndustriaX has become one of our most trusted global suppliers for industrial spare parts.
- Sarah Johnson
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Finding authentic automation parts has always been a challenge, especially for discontinued models. IndustriaX Limited has impressed us with their genuine stock, clear product traceability, and prompt updates. We’ve verified their shipments against OEM specs multiple times, and the results are flawless. They’re now our preferred sourcing partner for critical systems.
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Finding authentic automation parts has always been a challenge, especially for discontinued models. IndustriaX Limited has impressed us with their genuine stock, clear product traceability, and prompt updates. We’ve verified their shipments against OEM specs multiple times, and the results are flawless. They’re now our preferred sourcing partner for critical systems.
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Professional Service with After-Sales Support"IndustriaX Limited doesn’t just ship products—they provide solutions. When we encountered installation issues with one of the modules, their technical team replied in less than 4 hours and provided wiring guides and troubleshooting tips. This level of post-sale support is rare in the spare parts sector. Their professionalism gives us confidence in every order."
- Emily Brown
"IndustriaX Limited doesn’t just ship products—they provide solutions. When we encountered installation issues with one of the modules, their technical team replied in less than 4 hours and provided wiring guides and troubleshooting tips. This level of post-sale support is rare in the spare parts sector. Their professionalism gives us confidence in every order."
- Emily Brown
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We've tested multiple suppliers over the years, but IndustriaX Limited consistently stands out. Their product catalog is extensive, their team is knowledgeable, and they understand the urgency of industrial needs. With every order, we receive timely updates, fast delivery, and 100% genuine products. It’s rare to find such consistency and reliability in this field.
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We've tested multiple suppliers over the years, but IndustriaX Limited consistently stands out. Their product catalog is extensive, their team is knowledgeable, and they understand the urgency of industrial needs. With every order, we receive timely updates, fast delivery, and 100% genuine products. It’s rare to find such consistency and reliability in this field.
- Michael Anderson