The MPU is mounted on the flywheel housing reading the ring gear teeth. This signal tells the controller how fast the engine is running.
If you are looking for a specific wiring scenario—such as interfacing the S6700H with a PLC, using a 4-20mA remote speed command, or wiring for dual generators in parallel—consult the full Cummins installation manual. However, for 90% of standard applications, this guide and the pinout table above will serve as your definitive reference. cummins speed controller s6700h wiring diagram