The DN300-RN is an 8 channel telemetry unit that can be used for monitoring and control functions. The unit can have either a 0.25 or 1 watt radio module plugged in; depending on the transmission distances required. A DN300 gateway is required for use with the DN300-RN.

For sites where there is a need for more than 8 inputs or outputs, 8 channel expansion boards can be connected. Up to 3 additional 8 channel expansion boards can be connected, providing up to 32 input and/or outputs at a site.