Allen-Bradley 1794-IF4I Flex I/O Analog Input Module

Overview
The Allen-Bradley 1794-IF4I is a FLEX I/O isolated analog input module designed to provide reliable signal acquisition in industrial automation systems. It features four isolated analog input channels that can handle both current and voltage signals, offering flexibility and accuracy for a wide range of applications.

Technical Specifications

• Manufacturer: Rockwell Automation

• Brand: Allen-Bradley

• Part Number/Catalog No.: 1794-IF4I

• Product Description: FLEX I/O Isolated Analog Input Module

• Conversion Type: Sigma-Delta

• Number of Inputs: 4 isolated channels

• Input Signal Types:

• Current: 0–20 mA, 4–20 mA, ±20 mA

• Voltage: ±10 VDC, 0–10 VDC, ±5 VDC, 0–5 VDC

• Input Resolution:

• 16 bits – unipolar

• 15 bits + sign – bipolar

• Current: 0.320 µA/count unipolar, 0.640 µA/count bipolar

• Voltage: 0.156 mV/count unipolar, 0.313 mV/count bipolar

• Terminal Base Units: 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, 1794-TBN

• External DC Supply (Nominal): 24V DC

• External DC Supply Range: 19.0…31.2 VDC (including 5% AC ripple)

• Mounting: DIN Rail

• Wire Size: Determined by installed terminal base

• Operating Temperature: 0…55 °C (32…131 °F)

• Storage Temperature: –40…85 °C (–40…185 °F)

• Vibration: 5g @ 10 to 500 Hz

• Operating Shock: 30g

• FlexBus Current: 50 mA

• Isolation Voltage: 120 V Continuous

• Power Dissipation: 2.0 W @ 31.2 VDC max.

• Thermal Dissipation: 6.8 BTU/hr @ 31.2 VDC max.

• Shipping Weight: Approx. 0.3 lb

• UPC: 10781180908634

• UNSPSC: 32151602

Description
The Allen-Bradley 1794-IF4I FLEX I/O module provides four differential-ended, isolated analog inputs with a built-in power and status indicator. It is compatible with several terminal base units, including 1794-TBT, 1794-TBT3S, 1794-TB3, 1794-TB3S, 1794-TBNF, and 1794-TBN.

With a sigma-delta input conversion type, the 1794-IF4I offers a conversion rate of 2.5 to 7.5 milliseconds for all channels. It comes factory-calibrated but can be recalibrated when required. Its accuracy is rated at 0.1% full scale at 25 °C for both voltage and current inputs. Voltage input accuracy accounts for gain, repeatability, offset, and nonlinearity error terms.

The module operates with a FlexBus current of 50 mA and FlexBus voltage of 5V DC, making it a dependable component for precise and efficient analog data acquisition in distributed control systems.