Abstract: A backplane that includes a first processor slot, a second processor slot, a plurality of input/output (I/O) slots, a first I/O bus, a second I/O bus electrically isolated from the first I/O bus, and a plurality of I/O connection ports. The first processor slot includes a first processor connection port having a plurality of pins electrically connected to a first processor bus. The second processor slot includes a second processor connection port having a plurality of pins connected to a second processor bus, that is electrically isolated from the first processor bus. The plurality of I/O connection ports each include a first set of pins electrically connected to the first I/O bus, and a second set of pins electrically connected to the second I/O bus. Each of the first processor slot, the second processor slot, and the plurality of I/O slots include at least one of the I/O connection ports.

Abstract: The subject matter of this specification can be embodied in, among other things, a method for controlling a turbine engine that includes measuring, by a speed sensor, waveforms indicative of a speed of a rotating machine. Receiving the waveforms from the speed sensor and providing data representing the waveforms to a first signal path and to a second signal path, wherein the second signal path is isolated from the first signal path such that data communications at the second signal path do not interfere with communications on the first signal path. Controlling, responsive to the data received along the first signal path, one or more operations of the rotating machine. Storing, the data received along the second signal path, individual samples of the data in association with a respective timestamp indicating a time that the data was received.