Emerson KJ4001X1-NB1 (12P3368X012) is a Dual Left Extender module used in the Emerson DeltaV system. It is designed to extend the communication capabilities of the DeltaV system by providing additional LocalBus connectivity options.

The Dual Left Extender module allows for the expansion of the LocalBus network connections, which enables the connection of multiple DeltaV modules, such as controllers, I/O modules, and other devices. This extender module helps in extending the reach and increasing the capacity of the LocalBus network, facilitating efficient communication and data transfer between different components of the DeltaV system.

The 12P3368X012 cable extender module supports dual left connections, allowing for flexibility in system configuration and cable routing. It enables the DeltaV system to be scaled and expanded according to the specific requirements of the application.