Allen-Bradley 1790-T8BV8VX Expansion I/O Module

Description

Allen-Bradley 1790-T8BV8VX Expansion I/O Module

Product Dimensions：

The Allen-Bradley 1790-T8BV8VX is a high-density, compact CompactBlock LDX I/O module. This series is designed for lower-cost, space-sensitive applications that require reliable connectivity via the DeviceNet network.

Product Detailed Description

The 1790-T8BV8VX is a “split” I/O module, meaning it provides both digital inputs and digital outputs in a single, small-footprint housing. It features 8 Digital Inputs (24V DC Sink) and 8 Digital Outputs (24V DC Source/Sourcing). The “LDX” designation signifies it is a light-duty version of the standard CompactBlock, optimized for cost-effectiveness in distributed I/O architectures.

Technical Parameters

Product Advantages

• Cost-Effective Design: Specifically engineered for applications where a full-scale PLC rack is too expensive or bulky.
• Space-Saving: The ultra-compact block design allows for decentralized I/O, meaning you can place the module closer to the actual sensors and actuators, reducing wiring costs.
• Integrated Diagnostics: Status LEDs on the front panel allow for quick visual troubleshooting of the network connection and individual I/O point health.
• Ease of Integration: It is fully compatible with Rockwell Automation’s EDS (Electronic Data Sheet) files, making it easy to configure within RSNetWorx for DeviceNet.

Important Considerations (Precautions)

• Current Limits: Ensure the total current draw for the 8 outputs does not exceed the module’s aggregate thermal limit, especially in high-temperature environments.
• DeviceNet Power: The module draws its logic power directly from the DeviceNet cable. Ensure your network power supply is adequately sized for all nodes on the trunk line.
• Polarity: Since this is a DC module with specific Sink inputs and Source outputs, double-check the wiring of your field devices (sensors/solenoids) to ensure they match the polarity of the module.
• Environment: This is an open-style module and should be installed in an enclosure that provides protection against dust, moisture, and conductive contaminants.

Product Applications

The 1790-T8BV8VX is ideal for distributed control in various sectors:

• Conveyor Systems: Managing photo-eyes (inputs) and motor starters or diverters (outputs) along a production line.
• Packaging Machinery: Controlling small pneumatic valves and proximity switches where space inside the machine frame is limited.
• Assembly Cells: Providing a local interface for push-button stations and indicator lights on a DeviceNet network.
• Material Handling: Interfacing with sensors on automated storage and retrieval systems (AS/RS).

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