The RCRGN-500-2 is a proprietary cable designed to establish the internal BUS connection within a Carlo Gavazzi NRG system. This 500cm long cable is terminated at both ends with a microUSB plug, ensuring a secure link between the NRGC controller and RG..N solid state relays, or between multiple relays in a chain. As a 5-way cable, it carries the +24V supply, ground, data, and an autoconfiguration line. It is an essential component for enabling communication, power distribution, and the autoconfiguration sequence for solid state relays in the NRG monitoring and control system.