The RCRGN-075-2 is a proprietary internal BUS cable designed for use with the Carlo Gavazzi NRG system. This 5-way cable has a length of 75cm and is terminated at both ends with a micro-USB connector. It is specifically engineered to physically link NRGC controllers to RG..N solid state relays or to connect multiple RG..N relays together within a BUS chain. The cable carries essential lines for system operation, including +24V supply, ground, data, and an autoconfiguration line. Its function is critical for establishing the internal BUS, enabling communication, power distribution, and automatic ID assignment for relays.