1794-IF4I

Overview

Allen-Bradley 1794-IF4I is a FLEX I/O isolated analog input module with four independent channels. It is designed for flexible installation across multiple terminal base options and provides robust isolation for industrial automation applications.

Input Specifications

• Number of inputs: 4 isolated channels

• Data formats supported:

  • 2’s complement

  • 2’s complement %

  • Binary

  • Offset binary

Module Location

• Compatible terminal bases:

  • 1794-TB2

  • 1794-TB3

  • 1794-TB3S

  • 1794-TB3T

  • 1794-TB3TS

  • 1794-TBN

Power Specifications

• Flexbus voltage: 5 V DC

• Flexbus current: 55 mA

• External DC supply voltage range: 19.2–31.2 V DC (includes 5% AC ripple)

• Nominal external DC supply: 24 V DC

• External DC supply current: 145 mA @ 24 V DC

• Thermal dissipation (max): 6.8 BTU/hr @ 31.2 V DC

• Power dissipation (max): 2.0 W @ 31.2 V DC

Isolation Ratings

• 120 V continuous (Basic Insulation Type):

  • Channel-to-channel

  • Channel-to-user

  • Channel-to-system

  • User power-to-system (with TB2, TB3, TB3S, TB3T, TB3TS)

• 250 V continuous (Basic Insulation Type):

  • Same isolation paths when used with TB-N terminal base

• Type tested: 1000 V AC for 60 seconds

Indicators and Controls

• Status indicator: 1 red/green LED (power/status)

• Keyswitch position: 3

Mechanical Specifications

• Dimensions (H × W × D): 94 × 94 × 66 mm (3.7 × 3.7 × 2.6 in.)

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