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Allen-Bradley 1794-IA16 Flex 16-Point Digital Input Module

Product Overview

The Allen-Bradley 1794-IA16 is a Flex I/O AC digital input module that provides 16 non-isolated input channels for industrial automation applications. It is part of Rockwell Automation's flexible distributed I/O system designed to bring I/O points closer to sensors and actuators .

Key Specifications

Electrical Characteristics

Input Type: 16 non-isolated AC input channels
Input Voltage Range: 74-132V AC (nominal 120V AC)
On-State Voltage: Minimum 74V AC, Maximum 132V AC
Off-State Voltage: Maximum 20V AC
Current Consumption:
- FlexBus current: 20mA @ 5V DC
- Maximum power consumption: 6.4W @ 132V AC
Input Current:
- Minimum off-state: 2.9mA
- Minimum on-state: 5.49mA
- Maximum on-state: 14.81mA
- Nominal @ 120V AC: 12mA

Mechanical Characteristics

Dimensions: 46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in)
Mounting: DIN rail or panel mount
Weight: Approximately 0.24 kg

Environmental Specifications

Operating Temperature: 32 to 131°F (0 to 55°C)
Storage Temperature: -40 to 185°F (-40 to 85°C)
Relative Humidity: 5% to 95% non-condensing
Vibration: 5-10Hz @ 500G operating

Key Features

Flexible Installation: Compatible with various Flex I/O communication adapters including ControlNet (1794-ACN), Ethernet/IP (1794-AENT), and Remote I/O (1794-ASB)
Simplified Wiring: Uses terminal bases (1794-TB3, 1794-TB3S, etc.) that allow daisy-chaining of power connections, reducing wiring complexity
Visual Indicators: 16 yellow status LEDs (one per channel) for easy monitoring of input status
High Isolation: Tested at 1,264V AC for 60 seconds between field and system sides
Robust Design: Withstands industrial environments with vibration and shock resistance

System Integration

Requires compatible terminal base (1794-TB3, 1794-TB3S, 1794-TBN, etc.) for installation 13
Works with Flex I/O communication adapters to connect to various networks including DeviceNet, ControlNet, and Ethernet/IP
Distributed I/O architecture reduces wiring costs by locating I/O near field devices