In one embodiment, a portable monitoring system can include a secondary bus and a first monitoring circuit detachably coupled to the secondary bus. The first monitoring circuit can be configured to receive, from a first bus via a node comprising one or more gates, a first beacon packet of a monitoring system of an industrial machine. The first beacon packet can include a first system frame schedule indicative of a plurality of time slices during which a plurality of data packets can be configured to be broadcasted on the first bus of the monitoring system. The first monitoring circuit can also be configured to determine, a first set of time slices of the plurality of time slices during which a first set of data packets including data characterizing one or more predetermined operating parameters are broadcasted on the first bus. The first monitoring circuit can be further configured to transfer the first set of data packets from the first bus to the first monitoring circuit by activating the one or more gates in the node during a first set of time slices of the plurality of time slices. The one or more gates are configured to prevent transfer of an outgoing data packet to the first bus.