Product Overview

The 1794-IB16 mounts near sensors or field devices to reduce wiring costs. This distributed I/O approach simplifies maintenance and increases system uptime. The module supports standard DIN rail or direct panel mounting. You must use it with a compatible terminal base for signal wiring. A communication adapter transfers I/O data to the controller or scanner.

Technical Specifications

The 1794-IB16 delivers reliable performance with precise electrical characteristics.

• Manufacturer: Rockwell Automation / Allen-Brandley

• Part Number: 1794-IB16

• Number of Inputs: 16 sinking channels

• Nominal Input Voltage: 24 VDC

• On-state Voltage Range: 10 to 31.2 VDC

• On-state Current Range: 2.0 to 12.0 mA

• Off-state Voltage Maximum: 5 VDC

• Off-state Current Maximum: 1.5 mA

• Nominal Input Impedance: 4.6 kΩ

Power and Thermal Data

• Flexbus Current: 30 mA at 5 VDC

• Power Dissipation: 6.1 W maximum at 31.2 VDC

• Thermal Dissipation: 11.9 BTU/hr at 31.2 VDC

Environmental Ratings

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

• Storage Temperature: -40 to 85 °C (-40 to 185 °F)

• Relative Humidity: 5 to 95% non-condensing

• Vibration Resistance: 5G at 10 to 500 Hz

• Operating Shock: 30G

Physical and Status Features

• Status Indicators: 16 yellow LEDs, one per channel

• Mounting Type: DIN rail or direct panel

• Wire Size: Determined by the installed terminal base

• Enclosure Type: Open style for use in a cabinet

Compatible Components

The 1794-IB16 requires a terminal base and a communication adapter.

Compatible Terminal Bases:

• 1794-TB3

• 1794-TB3S

• 1794-TB3K

• 1794-TB3SK

• 1794-TBKD

• 1794-TB37DS

Compatible Communication Adapters:

• 1794-ADN for DeviceNet

• 1794-ASB for Remote I/O

• 1794-AENT for EtherNet/IP

• 1794-APB for Profibus DP

• 1794-ACN for ControlNet

Installation Guidance

Follow these steps to install the 1794-IB16 correctly.

1. Mount the Terminal Base: Secure the base unit onto a DIN rail or panel.

2. Wire Field Devices: Terminate all sensor wires to the base's removable terminals.

3. Install the Module: Press the 1794-IB16 firmly into the terminal base.

4. Attach the Adapter: Connect a compatible communication adapter to the left side.

5. Apply Power: Verify the 24VDC supply meets the module's requirements.

6. Check LEDs: Observe the yellow status indicators for each channel.

The 1794-IB16 supports both standard and XT versions for extreme environments. The D version adds diagnostic capabilities for easier troubleshooting.

Package Contents

• One (1) Allen-Bradley 1794-IB16 Flex I/O Input Module

• Installation instructions quick reference guide

Frequently Asked Questions (FAQ)

1. What is the input type of the 1794-IB16 module?
The 1794-IB16 has sixteen sinking input channels for 24VDC signals. This wiring configuration is standard for many sensors and switches.

2. Which terminal bases work with the 1794-IB16?
Compatible bases include 1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK, 1794-TBKD, and 1794-TB37DS. Choose based on your wiring needs.

3. Can the 1794-IB16 operate without a communication adapter?
No, the 1794-IB16 requires a communication adapter like the 1794-AENT for Ethernet. The adapter handles data transfer to the main controller.

4. What is the maximum power dissipation of the 1794-IB16?
The 1794-IB16 dissipates up to 6.1 Watts at 31.2 VDC. This rating helps you calculate your system's total heat load.

5. How do I know if an input channel is active on the 1794-IB16?
Each of the sixteen channels on the 1794-IB16 has a yellow status LED. The LED turns on when the input voltage is within the On-state range.