1794-OM8 | Flex I/O 240V AC Output Module Allen-Bradley

Product Introduction 1794-OM8

The Allen-Bradley 1794-OM8 provides a reliable and high-power digital output solution for the Flex I/O system. This module features eight non-isolated outputs specifically designed for AC load switching. With a nominal output voltage of 240V AC, the 1794-OM8 is perfectly suited for controlling a wide range of industrial AC devices. These include motor starters, solenoids, and indicator lamps. Its design facilitates hot swapping, allowing module replacement without powering down the system. This feature significantly minimizes downtime and boosts overall system availability.

Technical Specifications 1794-OM8

The 1794-OM8 operates with an on-state voltage range of 159 to 264V AC. It delivers a maximum on-state current of 500mA per channel, with a total module output current rating of 4.0A. The maximum on-state voltage drop is a low 1.5V AC at 0.5A, ensuring efficient power delivery. Additionally, the off-state leakage current is kept to a minimum of just 2.5mA maximum. This low leakage helps prevent false triggering of connected loads.

Furthermore, the module provides continuous isolation of 250V AC between the I/O and the system. Its FlexBus current draw is 60mA at 5V DC. The 1794-OM8 dissipates a maximum power of 5W at 0.5A, with a corresponding thermal dissipation of 17.1 BTU/hr. These specifications make it a robust and reliable choice for demanding AC output applications.

Mechanical and Environmental Parameters 1794-OM8

The Allen-Bradley 1794-OM8 is engineered for durability in industrial settings. It features 16 yellow LED status indicators. These provide clear, logic-driven visual feedback for each of the eight output channels, simplifying troubleshooting. The module operates reliably within a temperature range of 0 to 55 °C. It also supports a relative humidity range of 5 to 95% non-condensing. This ensures dependable performance across various environmental conditions commonly found in factories.

Installation and Wiring Guide

Installing the 1794-OM8 is a simple process. It is compatible with the 1794-TBNF and 1794-TBN terminal base units. First, ensure the keyswitch on the base is set to the correct position for this module. Next, mount the terminal base securely onto a standard DIN rail. Then, align the 1794-OM8 module with the base and press it firmly until the retaining latch clicks. The module can be inserted or removed under power due to its design. Finally, connect your AC loads to the appropriate screw terminals on the base unit. Always ensure the AC power supply is within the specified voltage range before operation.

Packaging and Shipping

Your Allen-Bradley 1794-OM8 module will arrive in secure packaging designed for industrial components. The shipment includes the digital output module only. The compatible terminal base unit and any mounting hardware are sold separately. We exclusively partner with leading global carriers for all shipments. Therefore, your order will be delivered using Fedex, UPS, or DHL for fast and safe delivery.

Frequently Asked Questions (FAQ)

1. What is the nominal voltage for the 1794-OM8 outputs?
The Allen-Bradley 1794-OM8 has a nominal output voltage of 240V AC.

2. How many outputs does the 1794-OM8 provide?
This module provides eight (8) non-isolated digital outputs.

3. Which terminal bases are compatible with this module?
The 1794-OM8 is compatible with the 1794-TBNF and 1794-TBN terminal base units.

4. Can I replace the 1794-OM8 without disconnecting power?
Yes, the Flex I/O system supports hot swapping, so you can remove or insert the 1794-OM8 while power is applied.

5. What is the maximum current rating for the module?
The total module output current rating is 4.0A, with a maximum of 500mA per channel.