Allen-Bradley 1790-8BV8BX 24V DC 8 Universal Input/8 Sourcing Output Module

Product Introduction

When your automation system requires a compact and reliable I/O solution, the Allen-Bradley 1790-8BV8BX delivers. This 24V DC base module combines 8 universal inputs and 8 sourcing outputs in a single unit, simplifying wiring and reducing panel space. Designed for demanding industrial environments, it offers nonisolated points with flexible sinking or sourcing input configurations. Whether you are upgrading an existing line or building a new system, the 1790-8BV8BX provides the performance and durability you expect from Allen-Bradley.

Technical Specifications Breakdown

The 1790-8BV8BX features 8 nonisolated input points that accept both sinking and sourcing signals. The on-state voltage ranges from 9.6V DC minimum to 28.8V DC maximum, with a nominal 24V DC. Each input draws up to 8 mA at 28.8V DC. Off-state voltage is 5V DC maximum, and input impedance is 4.8 kΩ nominal. Eight green status indicators provide clear visual feedback for each channel.

On the output side, 8 nonisolated sourcing points deliver on-state voltage from 10V DC minimum to 28.8V DC maximum (24V DC nominal). The on-state voltage drop is 0.5V DC maximum. Each output can source 1 mA minimum and up to 0.5 A maximum, with a total of 4.0 A maximum per common. Output signal delay is 0.5 ms maximum from off to on and 1.0 ms maximum from on to off. Eight green status indicators monitor output states.

General specifications include a supply voltage range of 11…28.8V DC for the base module, with power dissipation of 1.2 W maximum at 28.8V DC. Field power supply voltage range is 10…28.8V DC, with 6 mA dissipation per point at 28.8V DC. Isolation between I/O and logic uses photocoupler isolation rated at 1250V AC RMS. DeviceNet power and logic are nonisolated. Wiring connects via a 37-pin D-shell connector.

Industry Applications

The 1790-8BV8BX excels in discrete manufacturing, packaging, and material handling systems where space is limited. For example, in a packaging line, it can read sensor inputs for product presence and control solenoid outputs for diverters. Its fast output signal delay (0.5 ms off to on) ensures precise timing. In automotive assembly, the module handles limit switch inputs and drives indicator lights, benefiting from the wide voltage range to accommodate fluctuating power supplies.

Installation & Setup Guidance

Mount the 1790-8BV8BX on a DIN rail or panel using the provided slots. Connect field wiring to the 37-pin D-shell connector, ensuring proper polarity for sinking or sourcing inputs. Set the DeviceNet node address and baud rate via dip switches (if applicable). Apply 24V DC power within the 11…28.8V DC range to the base module. Verify status LEDs illuminate for each active channel. For expansion modules, use the 1790D-8BV8B common type configuration.

Maintenance & Reliability

Routine inspection of the 1790-8BV8BX ensures long-term reliability. Check the 37-pin D-shell connector for tightness and corrosion. Verify that the 24V DC supply remains within the specified 11…28.8V DC range to avoid damage. Clean the enclosure with a dry cloth; avoid solvents. The photocoupler isolation protects against voltage spikes, but periodic testing of I/O points with a multimeter confirms proper operation. Replace the module if status LEDs fail to illuminate or outputs do not switch.

Selection Guide & Purchasing Advice

Before purchasing the 1790-8BV8BX, confirm your system requires 8 universal inputs and 8 sourcing outputs at 24V DC. Verify compatibility with your DeviceNet network and available power supply. For complete technical specifications, please contact BluePLC Industrial. BluePLC Industrial offers genuine Allen-Bradley modules with fast shipping and expert support to keep your operations running smoothly.