Allen-Bradley 1790-8BV8BX - 8-Input/8-Output Flexible I/O Module for DeviceNet

Maximize your network I/O flexibility with the Allen-Bradley 1790-8BV8BX. This versatile ArmorBlock module combines 8 universal digital inputs and 8 sourcing digital outputs in one compact unit for DeviceNet systems. The inputs can be wired as either sinking or sourcing, giving you maximum compatibility with various field sensors. The outputs provide reliable control for actuators. It's the perfect space-saving solution for mixed signal points on your machine.

Module Highlights

• Dual-Function Design: Get both inputs and outputs in one module, ideal for compact control panels and distributed I/O stations.
• Wiring Flexibility: The 8 inputs are "universal," meaning they work with both PNP (sourcing) and NPN (sinking) sensors without hardware changes.
• Robust Outputs: 8 sourcing outputs provide 0.5A per point to reliably drive solenoids, relays, and indicators directly.
• Clear Diagnostics: 16 independent green LED lights (8 for inputs, 8 for outputs) give instant visual status of every channel.

Complete Technical Specifications

Brand & Series: Allen-Bradley ArmorBlock (1790 Series)

Full Model Number: 1790-8BV8BX

Module Type: 8-Channel Universal Input / 8-Channel Sourcing Output Combo Module

Digital Inputs: 8 points, Sinking or Sourcing configurable (Universal)

Input Voltage: 9.6V to 28.8V DC (24V DC Nominal)

Input Current: 8 mA max per point @ 28.8V DC

Digital Outputs: 8 points, Sourcing (PNP)

Output Rating: 0.5 A per point, 4.0 A total per common group

Output Voltage: 10V to 28.8V DC (24V DC Nominal)

Switching Speed: ON Delay: 0.5 ms max, OFF Delay: 1.0 ms max

Field Power Supply: 24V DC (10V - 28.8V range)

Isolation: 1250V AC RMS (Photocoupler isolation between I/O field side and internal logic)

Wiring: 37-pin D-shell connector

Status Indicators: 16 Green LEDs (8 for Input status, 8 for Output status)

Installation & Wiring Guide

Mount the 1790-8BV8BX on a standard DIN rail. Connect your 24V DC field power. For the universal inputs, you can wire either a PNP (sourcing) or NPN (sinking) proximity sensor directly - the module detects the polarity automatically. For the sourcing outputs, connect your load (e.g., a pilot light) between the output terminal and the DC common (-). Ensure the total current for all outputs does not exceed the 4.0 Amp limit.

Package & Warranty

What's Included: 1 x Allen-Bradley 1790-8BV8BX Combination I/O Module.

Our Guarantee: This product comes with a reliable 12-month warranty.

Fast Shipping Service

We ship quickly worldwide using FedEx, UPS, and DHL.

Frequently Asked Questions (FAQ)

What does "universal input" mean?

It means each input channel can accept either a sourcing (PNP) or sinking (NPN) sensor signal. You don't need to order a specific module or change hardware; just wire your sensor, and it will work.

Can I use all 16 points (8 in, 8 out) at the same time?

Yes, the inputs and outputs operate completely independently. You can read 8 sensors and control 8 actuators simultaneously through this single 1790-8BV8BX module.

What is the difference between sourcing and sinking outputs?

A sourcing output (like on this module) provides the positive voltage to the load. A sinking output connects the load to ground. Always match your output type to your load's wiring requirements.

How is the module configured on the DeviceNet network?

You set the unique node address (MAC ID) and communication speed (125K, 250K, 500K baud) using the rotary switches on the module's side. The I/O data mapping is typically configured in your master scanner's software (like RSNetWorx).

Is a separate power supply needed for the inputs and outputs?

Yes, you must provide a separate 24V DC field power supply to power the sensors connected to the inputs and the loads connected to the outputs. The DeviceNet connection provides power only for the module's internal logic.

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