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1794-OB8EP

Allen-Bradley 1794-OB8EP | 8-Channel Protected DC Output Module

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  • Manufacturer: Allen-Bradley

  • Product No.: 1794-OB8EP

  • Product Type: Digital Output Module

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 190g

  • Shipping port: Xiamen

  • Warranty: 12 months

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Product Overview

The Allen-Bradley 1794-OB8EP is a high-density Digital DC Output Module within the FLEX I/O™ family, designed to provide robust control for industrial automation systems. This 8-point module is specifically engineered with "Electronically Protected" (EP) outputs, offering built-in safeguards against short circuits and overcurrent conditions without the need for external fusing. Weighing only 0.19 kg, it is a lightweight yet powerful solution for driving actuators, solenoids, and relays in distributed I/O architectures.

Technical Specifications

Parameter Specification
Module Type Protected Digital DC Output
Number of Outputs 8 Sourcing Channels
Output Voltage 24V DC Nominal (18-30V DC Range)
Current Rating 2.0A max per output channel
Unit Weight 0.19 kg (0.42 lbs)
Operating Temp -20°C to 60°C (-4°F to 140°F)
Isolation Voltage 50V (Continuous)

Installation & Engineering Guide

Proper installation of the FLEX I/O module ensures maximum system uptime and safety:

  • Electronic Protection: The 1794-OB8EP features intelligent output protection. If a short circuit occurs, the module automatically disables the affected channel, preventing damage to the module backplane and connected field devices.
  • Thermal Management: With a maximum power dissipation of 5.5W, ensure adequate spacing within the terminal base. The module is designed for an operating range of -20°C to 60°C.
  • Flexbus Integration: The module draws 73mA from the Flexbus at 5V DC. Verify your adapter's power budget when adding multiple high-current modules to a single rail.
  • Mechanical Durability: Rated for 30g shock and 5g vibration (10 to 500Hz), this module is suitable for mounting on machinery subject to significant mechanical stress.

Engineering Advantages

  • Reduced Maintenance: The "EP" designation eliminates the need for physical fuses, reducing spare parts inventory and simplifying fault recovery.
  • High Current Density: Capable of sourcing up to 2.0A per point, allowing it to drive larger solenoids and actuators directly without interposing relays.
  • Hot-Swap Capability: As part of the FLEX I/O system, the 1794-OB8EP can be removed and inserted under power (RIUP) when used with a compatible terminal base, minimizing process downtime.
  • Global Compliance: Fully CE, UL, cUL, and RoHS compliant for use in regulated international markets.

Technical FAQs

Q1: What happens if an output channel on the 1794-OB8EP shorts out?
A1: The electronic protection will trip, shutting down only the faulted channel to prevent module damage. Once the fault is cleared, the channel can be reset via the control software.

Q2: Is a specific terminal base required for this 0.19 kg module?
A2: Yes, the 1794-OB8EP is typically used with terminal bases like the 1794-TBN or 1794-TB3, which provide the necessary termination for 24V DC sourcing outputs.

Q3: Can I use this module to drive AC loads?
A3: No. The 1794-OB8EP is strictly a Digital DC Output module designed for sourcing 24V DC current. For AC loads, an equivalent AC output module (such as the 1794-OA8) should be used.

🏷️ Tags: Digital Output Module
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