PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1794-IF4I is a FLEX I/O isolated analog input module. It features four individually isolated analog input channels. The module utilizes Sigma-Delta analog-to-digital conversion with 16-bit resolution. Each channel supports configurable voltage or current operating ranges. Supported current ranges include 0 to 20 mA, 4 to 20 mA, and -20 to 20 mA. Selectable voltage ranges cover 0 to 5V, -5 to 5V, 0 to 10V, and -10 to 10V.
The 1794-IF4I provides continuous channel-to-channel and channel-to-system isolation rated at 120 volts. It draws 50 mA from the FlexBus backplane. The module requires a nominal 24-volt direct-current external power supply. Channel update rates configure to 2.5, 5, or 7.5 milliseconds across all inputs. Maximum power dissipation equals 2.0 watts at 31.2 volts direct current. Thermal dissipation reaches 6.8 BTU per hour at maximum operating voltage. The hardware functions in temperatures from -20 to 55 degrees Celsius.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Product Line | Flex I/O 1794 |
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| GTIN | 10612598171573 |
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| Weight | 0.56 lbs (0.26 kg) |
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| UPC | 612598171576 |
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| Conversion Type | Sigma-Delta Type |
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| Update Rate for All Channels | 2.5, 5, or 7.5 ms |
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| Input Type | User-Configurable Voltage or Current Inputs |
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| Input Current Ranges | 0 to 20 mA, 4 to 20 mA, or -20 to 20 mA |
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| Input Voltage Ranges | -10 to 10V, 0 to 10V, -5 to 5V, or 0 to 5V |
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| Voltage Terminal Input Resistance Voltage | More than 10 Megaohms |
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| Current Terminal Input Resistance Voltage | Less than 100 Ohms |
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| Maximum Voltage Overload | 30 Volts Continuous for 1 Channel at a Time |
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| Maximum Current Overload | 32 mA Continuous for 1 Channel at a Time |
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| Operating Temperature | -20 to 55 degrees Celsius |
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| Storage Temperature | -40 to 85 degrees Celsius |
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| Non-Condensing Relative Humidity | 5 to 95% |
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| Max. Operating Shock | 30 G |
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TECHNICAL INFORMATION
Features
- Four isolated analog input channels with 16-bit conversion resolution.
- Sigma-Delta analog-to-digital converter architecture.
- Selectable channel update rates of 2.5, 5, or 7.5 milliseconds.
- User-configurable current ranges of 0 to 20 mA, 4 to 20 mA, and -20 to 20 mA.
- Selectable voltage ranges spanning -10 to 10V, 0 to 10V, -5 to 5V, and 0 to 5V.
- Voltage input resistance exceeding 10 Megaohms.
- Current terminal input resistance below 100 Ohms.
- Continuous channel isolation rated at 120 volts.
TECHNICAL INFORMATION
Connections / Interfaces
- Connects to the backplane via the 1794 terminal base drawing 50 mA FlexBus current.
- Accepts voltage input wiring on dedicated terminals with input impedance exceeding 10 Megaohms.
- Accepts current input wiring on terminals presenting less than 100 Ohms impedance.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module onto a compatible 1794 terminal base unit.
- Supply external direct-current power within the nominal 24-volt range.
- Maintain ambient operating temperatures between -20 and 55 degrees Celsius.
- Ensure operating relative humidity stays between 5 and 95 percent non-condensing.
TECHNICAL INFORMATION
Compatibility
- Integrates with Allen-Bradley FLEX I/O 1794 terminal base units.
- Communicates across FLEX I/O backplanes via standard FlexBus adapters.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSIntegrates with Allen-Bradley FLEX I/O 1794 terminal base units. Communicates across FLEX I/O backplanes via standard FlexBus adapters.
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 input types and ranges does the 1794-IF4I support?
The module accepts user-configurable voltage and current inputs. Current ranges include 0 to 20 mA, 4 to 20 mA, and -20 to 20 mA. Voltage ranges include -10 to 10V, 0 to 10V, -5 to 5V, and 0 to 5V.
What is the resolution and conversion type of the 1794-IF4I?
The 1794-IF4I provides 16-bit resolution using Sigma-Delta conversion. All four channels update at 2.5, 5, or 7.5 milliseconds.
What are the external power and isolation ratings for the 1794-IF4I?
The module requires a nominal 24-volt direct-current external power supply. It provides continuous electrical isolation rated at 120 volts.
