1746-OX8 | Allen-Bradley SLC 500 Relay Output Module

The Allen-Bradley 1746-OX8 is a digital contact output module used for switching high-current loads in industrial automation systems. It features 8 normally open relay contact outputs that are individually isolated, making it ideal for applications requiring separate control paths. The module can control both AC and DC loads and is suitable for interfacing with a wide range of field devices. It is typically used where robust and independent switching is needed, such as in motors, solenoids, or lamps.

The module provides 8 normally open (N.O.) relay contact outputs. Each output is individually isolated, meaning they do not share a common return path. This enhances electrical safety and allows for greater design flexibility in control systems. These outputs are especially useful for applications requiring independent switching of different voltage sources.

The 1746-OX8 supports a wide operating voltage range of 5–265V AC and 5–125V DC, which allows it to handle both low and high voltage applications effectively. This flexibility makes it compatible with various industrial components like relays, buzzers, and signal lamps. It’s especially useful in environments where different voltage systems are used concurrently. Such broad voltage support enhances the module’s adaptability in legacy and modernized automation systems. The wide range also reduces the need for additional interface modules.

The power dissipation for the 1746-OX8 is approximately 0.825 Watts per point, with a minimum module dissipation of 2.59 Watts and a maximum of 8.60 Watts. Effective heat management is crucial to ensure reliable operation and extend the lifespan of the module. Adequate ventilation or spacing in the control panel is recommended, especially in high-temperature environments. Overheating can lead to premature failure or performance degradation. Following installation guidelines helps maintain safe operating conditions.

No, the 1746-OX8 is no longer in production and has been officially discontinued by Allen-Bradley (Rockwell Automation). It is considered a legacy product and may only be available through secondary markets or surplus inventories. Users with existing systems can still source replacements or spares from authorized resellers. However, for new projects, it’s recommended to consider migrating to newer platforms like CompactLogix or ControlLogix. These newer systems offer modern communication and enhanced capabilities.