• Allen-Bradley 1794-OM8
  • Allen-Bradley 1794-OM8
  • Allen-Bradley 1794-OM8
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Allen-Bradley 1794-OM8 FLEX I/O 8-Point AC Digital Output Module

Allen-Bradley 1794-OM8 FLEX I/O 8-Point AC Digital Output Module

Description

The Allen-Bradley 1794-OM8 is a high-performance 8-point digital AC output module designed for the FLEX I/O distributed system. This module provides a reliable interface between PLC/PAC control logic and high-voltage...

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SKU: 1794-OM8
Vendor: Allen-Bradley
Category: Digital Output Module
Related Series:

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Description

The Allen-Bradley 1794-OM8 is a high-performance 8-point digital AC output module designed for the FLEX I/O distributed system. This module provides a reliable interface between PLC/PAC control logic and high-voltage AC field devices, such as actuators, solenoids, and alarm indicators. Engineered for space-efficient industrial applications, the 1794-OM8 allows for seamless integration into distributed control architectures, supporting a nominal output voltage of 240V AC.

Features

  • 8-Point Discrete Output Configuration
  • High-Voltage AC Switching (159V to 264V AC range)
  • Modular FLEX I/O Architecture for flexible system design
  • Zero-Cross Switching Technology to reduce electrical noise
  • Hot-swappable design when used with compatible terminal bases

Applications

  • Packaging and bottling line control
  • Assembly automation systems
  • Fluid handling and chemical dosing systems
  • Industrial HVAC control machinery
  • Remote I/O distributed control nodes

Technical Specifications

Model 1794-OM8
Number of Outputs 8, non-isolated
Nominal Output Voltage 240V AC
Operating Voltage Range 159V to 264V AC
Output Current Rating 4.0 A total (8 outputs @ 500 mA each)
Surge Current 7 A for 40 ms
Off-state Leakage Current 2.5 mA max
Flexbus Current 60 mA @ 5V DC
Power Dissipation 5.0 W @ 0.5 A
Thermal Dissipation 17.1 BTU/hr @ 0.5 A

Installation Guidelines

  • Mounting: Secure the compatible FLEX I/O terminal base onto a 35 x 7.5mm DIN rail.
  • Keyswitch: Set the keyswitch on the terminal base to position 8 to ensure mechanical compatibility with the 1794-OM8 module.
  • Module Insertion: Align the module with the terminal base slots, ensuring pins are straight, and press firmly until the latching mechanism clicks into place.
  • Wiring: Ensure all field power is disconnected before installing or removing the module. Use appropriate wire gauges for the terminal base connections.
  • Environment: Ensure adequate ventilation for heat dissipation; avoid mounting near high-EMI sources or extreme heat zones.

FAQ

What is the primary function of the 1794-OM8?

The 1794-OM8 is a digital output module used to interface a FLEX I/O system with 240V AC field devices, allowing the controller to switch high-voltage loads.

Is this module hot-swappable?

Yes, the FLEX I/O architecture allows for the electronic module to be removed and replaced while the system is powered, provided it is mounted on a compatible, pre-wired terminal base.

What is the maximum current capacity?

The module supports a maximum of 500 mA per output, with a total module current limit of 4.0 A.