140M-C-AFA11 | Allen-Bradley Auxiliary Contact Block, Front Mounted, 1 N.O. 1 N.C.

The 140M-C-AFA11 is a front-mounted auxiliary contact block designed for use with Allen-Bradley 140M-C2E manual motor protectors. It contains one normally open (1 NO) and one normally closed (1 NC) contact set, enabling monitoring and signaling functions in motor control applications. The auxiliary contact communicates the status of the main breaker (ON/OFF/tripped) to control systems or indicator lights. It is ideal for improving automation feedback and enhancing operator visibility. Only one auxiliary module of this type may be mounted per motor protector.

The auxiliary contacts are rated at 1.5 A at 230V AC-15, suitable for low-voltage control signals. These contacts are typically used for indicator lights, signaling PLC inputs, or triggering alarms. They are not meant to switch high-power loads, but rather serve low-current feedback or control loops. Proper circuit protection should be used to prevent contact damage. The contacts are designed for long operational life in control environments.

The 140M-C-AFA11 features a 1 NO (normally open) + 1 NC (normally closed) configuration. This allows simultaneous monitoring of both the “open” and “closed” states of the breaker. For example, the NO contact may be used to energize an indicator light when the breaker is closed, while the NC contact can signal the breaker’s open status to a PLC. This dual-state feedback improves system diagnostics and safety logic. It offers more flexibility than single-contact configurations.

No, only one 140M-C-AFA11 auxiliary contact can be mounted per compatible motor protection device. This is due to mechanical constraints and design compatibility. If additional signaling is required, side-mount auxiliary contacts (e.g., 140M-C-ASA11) can be added depending on the breaker type. Always follow manufacturer guidelines to prevent misoperation or damage. Using more than one front-mounted contact on the same breaker is not supported.

The 140M-C-AFA11 is compatible with Allen-Bradley 140M-C2E series manual motor protectors. It may also fit other members of the 140M-C/D/F product line, provided they support front-mounted auxiliary interfaces. Compatibility is ensured through a matching mechanical interface and electrical alignment. Use of non-compatible breakers can result in mechanical fitment issues or signal faults. Always consult Allen-Bradley datasheets for proper matching.