The RM400 is an advanced telemetry node, data logger, and valve controller capable of reading data from a variety of sensors and uploading that data to the Ranch Cloud™ platform.

The RM400 is built to be the backbone of your monitoring and control system. It is designed for ease of use, with a built-in display and keypad interface for in-field configuration, valve control, and data readout. Advanced configuration is available using a cabled PC connection or by real-time cloud server connection using the myRanch™ app.

The RM400 can control up to 48 valves* and provides multiple sensor input options. Using the myRanch app, you can create multiple, fully automated irrigation programs in a matter of minutes. Programs can be automatically optimized for the shortest possible run time, and dynamically adjusted based on real-time environmental conditions.

* Number of supported valves varies by configuration.


The RM400 has the following built-in features:

  • Outdoor-rated, impact-resistant, and UV-stabilized polycarbonate enclosure
  • OLED display w/keypad interface
  • 10 to 24V AC/DC flex power input
  • 3.7V Li-Ion rechargeable battery
  • Four status LEDs
  • ARM 32-bit CPU with 4MB flash file system for data buffering
  • Real-time operating system supporting Ranch Systems JavaScript for custom sensor and control integrations
  • USB-C cable interface for PC connection
  • Built-in WiFi modem
  • 5V and 12V DC excitation voltage generator
  • Eight (8) feedback sensor/digital counter ports
  • Onboard diagnostic sensors for internal temperature, battery voltage, current draw, charge current, and cellular/WiFi signal strength

The RM400 supports the following optional expansion components:

  • Cellular modem w/AGPS
  • 24VAC solenoid control output, up to 48 outputs w/four (4) stackable, 12-port expansion boards
  • Sensor input expansion board