100-FA22 | Allen-Bradley Auxiliary Contact Block 2NO/2NC Front-Mount

The Allen-Bradley 100-FA22 is a front-mounted auxiliary contact block used to expand the functionality of a contactor. It adds additional control contacts to monitor or control logic circuits in industrial systems. This device is commonly used for signaling, interlocking, or feedback functions in automation. It allows engineers to implement complex sequences or safety interlocks. By snapping onto the front of a contactor, it provides an efficient way to integrate into existing systems. It is widely used in motor starters and control panels.

The 100-FA22 features four contacts: 2 Normally Open (NO) and 2 Normally Closed (NC). This configuration allows for a combination of monitoring and control functions in a single unit. The NO contacts are typically used for signaling when the contactor is energized, while NC contacts are used for logic interruption or safety. The contact layout enables flexible circuit design. It is ideal for implementing interlocks or system feedback. This makes the block suitable for diverse automation tasks.

The 100-FA22 uses screw terminals for wire connection. These terminals provide a secure and vibration-resistant electrical connection. Screw-type terminals are compatible with a variety of wire gauges and crimp connectors. The layout is optimized for easy access during installation and testing. Terminal markings are clearly visible to prevent wiring errors. This connection method is standard for control circuits in industrial panels.

The auxiliary contact block includes a total of four poles. Two of them are Normally Open (NO) and two are Normally Closed (NC). Each pole functions independently, allowing for flexible integration into control circuits. The multi-pole configuration enables both feedback and interlock features in a compact form. This eliminates the need for multiple separate modules. It’s ideal for applications requiring redundant or complex signaling paths.

Yes, the Allen-Bradley 100-FA22 is still actively produced and supported by Rockwell Automation. It remains part of the standard accessory line for the 100-C contactor series. The auxiliary contact block is widely available through authorized distributors and system integrators. Rockwell continues to support this component in both new designs and replacement applications. It is recommended for use in modern and legacy systems alike. No end-of-life notice has been published for this part.