Allen-Bradley 1794-IV16 Flex I/O Input Module

1. General Description

The Allen-Bradley 1794-IV16 is part of the Flex I/O series. Engineers design it for high-performance discrete input in industrial control systems.

This Flex I/O Input Module has 16 DC digital input points. Perfect for small installations that need high reliability. The module supports a wide range of industrial applications, including process monitoring, equipment diagnostics, and advanced automation control systems.

It works well with Flex I/O terminal bases. It also connects with other Allen-Bradley Flex I/O Input Modules. These include the 1794-IB16, 1794-IB16XOB16P, 1794-IA16, and 1794-IF4I (analog input). These modules expand functionality to cover digital input, analog-to-digital converter, isolated inputs, and output module applications.

2. Technical Specifications

l Input Channels: 16

l Input Type: Sourcing (NPN)

l Operating Voltage Range: 10V to 31.2V DC

l Nominal Voltage: 24V DC

l On-State Current: Nominal 8.0 mA at 24V DC

l Input Impedance: Max 4.7 kΩ

l Isolation Voltage: Tested at 2121V DC for 1 second between user and system

l Input Filter Time: Configurable from 0.25 ms to 32 ms

l Power Dissipation: Max 5.7 W @ 31.2V DC

l Dimensions (H x W x D): 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.)

l Weight: Approximately 90 g (3.17 oz.)

3. Detailed Features of Allen-Bradley 1794-IV16

l Flexible Configuration – Users can set up the module using the configuration wizard. This allows them to adjust input filter times as needed.

l Status Indicators – Each of the 16 digital inputs includes yellow indicators for real-time state monitoring.

l Terminal Bases – Works seamlessly with Flex I/O terminal bases, such as the 1794-TB3.

l Mounting options support DIN rail or panel mounting.

l Temperature Range – Operates reliably between 0 °C and 55 °C.

4. Applications of Allen-Bradley 1794-IV16

The 1794-IV16 is widely used for:

l Industrial Control Systems – Managing AC power and DC power-driven processes.

l Process Monitoring – Collecting signals from sensors for operational efficiency.

l Equipment Diagnostics – Supporting troubleshooting and preventing downtime, often used with Allen-Bradley fault codes and 1394 fault codes.

l Automation Solutions – Integrating with PLCs and systems like Allen-Bradley PowerFlex drives.

5. Installation

Preparation:

l Ensure that the power supply is disconnected.

l Select the correct terminal base unit (e.g., 1794-TB3).

Mounting the Module:

l Align the module with the terminal base unit.

l Press until the latching mechanism clicks into place.

Wiring Connections:

l Connect individual input devices to the numbered terminals according to the wiring diagrams.

l Ensure that you properly connect the commons.

Configuration:

l Set the key switch on the terminal base to the appropriate position.

l Configure input filter times with the configuration word.

Testing and Powering Up:

l Restore DC power to the system.

l Confirm that all status indicators light correctly.

6. Related Part Numbers of Allen-Bradley Flex I/O Modules

l Allen-Bradley 1794-IV32 (32-point version)

l Allen-Bradley 1794-IV16D (diagnostic features)

l Allen-Bradley 1794-TB3 (terminal base unit)

l Allen-Bradley 1794-IB16 (digital input module)

l Allen-Bradley 1794-IB16XOB16P (input/output combination)

l Allen-Bradley 1794-IA16 (AC input module)

l Allen-Bradley 1794-IF4I (analog input, isolated channels)

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