A hydraulic cartridge valve is provided that is moveably received within a manifold in fluid communication with a hydraulic unit, such as that which drives heavy machinery. The present invention comprises a solenoid coil secured to and operatively connected to the hydraulic cartridge valve. In addition, a circuit board is secured to and in electronic communication with the solenoid coil. A controller area network is electronically connected to the circuit board such that a computer controls the operation of the solenoid coil, thereby controlling the performance of the hydraulic cartridge valve. The solenoid coil is secured to the cartridge valve by a securing nut and has a plurality of pins for directly mounting the coil to the circuit board.