Signal distribution device for a fluid pump

A signal distribution device for a hydraulic fracturing pump, comprising:

• a first data port configured to couple to a sensor;
• a second data port configured to couple to a first data receiver;
• a third data port configured to couple to a second data receiver;
• and
• a signal processing component communicatively coupling the first data port to the second data port and the third data port, the signal processing component comprising:
• a resistor in a first data path between the first data port and the second data port;
• a first stage differential amplifier, in a second data path branching from the first data path, configured to amplify a voltage difference across the resistor;
• and
• a second stage amplifier, in the second data path, configured to amplify an amplified signal that is output by the first stage differential amplifier for outputting to the second data receiver.

A hydraulic fracturing system, comprising:

• a fluid pump;
• a gauge port coupled to the fluid pump;
• a sensor coupled to the gauge port and configured to output a signal based on measurements of a fluid parameter relating to the fluid pump;
• a first data receiver and a second data receiver;
• and
• a signal distribution device coupled to the sensor, the first data receiver, and the second data receiver, the signal distribution device comprising:
• a first data port coupled to the sensor;
• a second data port coupled to the first data receiver;
• a third data port coupled to the second data receiver;
• and
• a signal processing component that communicatively couples the first data port to the second data port and the third data port, the signal processing component comprising:
• a resistor in a data path between the sensor and the first data receiver;
• a first stage differential amplifier configured to amplify a voltage difference across the resistor;
• and
• a second stage amplifier configured to amplify an amplified signal that is output by the first stage differential amplifier,
• wherein the signal distribution device is configured to distribute respective input signals to the first data receiver and to the second data receiver, and
• wherein the respective input signals are based on the signal.