The ProMoS NT computer communicates with the various hardware components via an internal network. The advantage of this topology is certainly its simple structure and configuration. Nowadays ProMoS NT communicates mainly via Ethernet, serial connections are also possible, but technically they are rather outdated. In most cases other bus systems (LON, Profibus DP, EIB/KNX etc.) are connected to ProMoS NT via a gateway (e.g. SaiaPCD). Meters can be connected directly to ProMoS NT.