PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1794-IF8IH FLEX I/O Analog Input Module provides isolated input processing for industrial automation architectures. It features eight isolated single-ended analog inputs designed for HART protocol communication. The module utilizes Sigma-Delta conversion to provide unipolar and bipolar resolution. Its unipolar resolution is 16 bits, while bipolar resolution provides 15 bits plus sign. An external DC power supply ranging from 19.2 to 31.2 Volts DC powers the device.
The module has an open enclosure type and mounts directly on compatible terminal base units. It operates in ambient temperatures between 32 and 131 degrees Fahrenheit. Flexbus backplane current draw requires 80 mA at 5 Volts DC during operation. Maximum power dissipation reaches 4.8 Watts at 31.2 Volts DC. Thermal dissipation is rated at a maximum of 16.4 BTU per hour. Each unit comes factory calibrated with support for field calibration during maintenance.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Category | PLCs |
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| UPC | 612598346905 |
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| Weight | 1.00 lbs (0.45 kg) |
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| Outputs | None |
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| Inputs | 8 |
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| Input type | single-ended, non-isolated |
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| Operating temperature | 32 to 131 degrees Fahrenheit |
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| Enclosure | Open |
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| Conversion | Sigma Delta |
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| External DC voltage rating | 19.2 to 31.2 Volts DC |
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TECHNICAL INFORMATION
Features
- Eight isolated single-ended HART analog input channels
- Sigma-Delta analog-to-digital signal conversion
- 16-bit unipolar and 15-bit plus sign bipolar resolution
- External power supply rating of 19.2 to 31.2 Volts DC with 5% ripple
- Flexbus current consumption of 80 mA at 5 Volts DC
- Factory calibrated with support for field calibration
- Maximum thermal dissipation of 16.4 BTU per hour at 31.2 Volts DC
TECHNICAL INFORMATION
Applications
- Industrial control architectures requiring isolated HART field instrument interfaces
- Distributed process automation using Allen-Bradley FLEX I/O platforms
- Hazardous location applications certified under North American standards
TECHNICAL INFORMATION
Connections / Interfaces
- Mounts on Allen-Bradley 1794-TB3 and 1794-TB3S terminal base units.
- Signal ports require category 2 shielded wiring.
- Power ports require category 3 wiring.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module onto an approved FLEX I/O terminal base.
- Shield all signal wiring to minimize electrical noise.
- Maintain ambient operating temperatures within 32 to 131 degrees Fahrenheit.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure channels for 16-bit unipolar or 15-bit plus sign bipolar resolution.
- Perform field calibration if required by system operating specifications.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley 1794-TB3 terminal bases.
- Compatible with Allen-Bradley 1794-TB3S terminal bases.
TECHNICAL INFORMATION
Compliance and Certifications
- North American Hazardous Location Approval
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley 1794-TB3 terminal bases. Compatible with Allen-Bradley 1794-TB3S terminal bases.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What terminal bases can be used with the 1794-IF8IH?
The module mounts on Allen-Bradley 1794-TB3 and 1794-TB3S terminal bases.
What external power does the 1794-IF8IH require?
It requires an external power supply between 19.2 and 31.2 Volts DC.
Does the 1794-IF8IH arrive calibrated?
The module is factory calibrated and also supports field calibration if needed.
What is the reference price range for the 1794-IF8IH?
Observed market prices range from $2,502.50 to $3,169.83 USD. These figures are indicative market reference pricing only and are not a final quotation.
