Allen-Bradley 1790D-T8BV8B I/O Module

Description

Allen-Bradley 1790D-T8BV8B I/O Module

Product Dimensions：

The Allen-Bradley 1790D-T8BV8B is a compact, high-performance distributed I/O module from the CompactBlock LDX I/O series. It is designed to provide a cost-effective solution for interfacing sensors and actuators with a DeviceNet network.

Product Detailed Description

The 1790D-T8BV8B is a “Base” I/O module that features an integrated DeviceNet communication adapter. It is a combination module, meaning it provides both digital inputs and digital outputs on a single hardware footprint. This specific model is designed for 24V DC operation and utilizes a compact form factor, making it ideal for installation in tight spaces or directly on machine frames.

Technical Parameters

Product Advantages

• Space-Saving Design: By combining inputs and outputs into one small block, it reduces the overall panel space required compared to separate modules.
• Cost-Efficiency: As an “LDX” (Low-cost Distributed eXpansion) module, it provides the essential functions of DeviceNet connectivity without the higher price tag of modular chassis-based systems.
• Simplified Wiring: Features removable screw-terminal blocks which allow for pre-wiring and rapid replacement of the module without disturbing the field cables.
• Plug-and-Play Integration: Fully compatible with Allen-Bradley EDS (Electronic Data Sheet) files, ensuring quick configuration within RSNetWorx for DeviceNet.

Important Considerations & Precautions

• DeviceNet Power: The module requires power from the DeviceNet trunk line for its internal logic. Ensure the network power supply has sufficient capacity to handle all nodes on the line.
• Inductive Loads: When driving inductive loads (such as solenoids or relays), it is highly recommended to use external surge suppression (diodes) to prevent back-EMF from damaging the 0.5A output transistors.
• Node Addressing: Ensure the MAC ID (Node Address) is set correctly via the onboard switches or software before adding the device to the network to avoid address conflicts.
• Environment: Ensure the ambient temperature remains within the specified operating range (0°C to 55°C) to maintain the longevity of the solid-state components.

Product Applications

The 1790D-T8BV8B is typically used in decentralized control architectures:

• Conveyor Systems: Connecting proximity sensors (inputs) and motor starters or diverters (outputs) along a long production line.
• Packaging Machinery: Interfacing with push buttons, limit switches, and small pneumatic valves.
• Assembly Cells: Providing local I/O for robotic workstations where space inside the control cabinet is limited.
• Material Handling: Used on automated guided vehicles (AGVs) or sorting systems that communicate via DeviceNet.

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