Haier AV16NMVERA Design Manual - Page 114

MRV II Commercial Air Conditioning Spec of cable: 1) Power: Two-core RVV, the section area is 0.5mm2, there is no polarity requirement when connection. 2) LON(LONWORKS communication) port: Two-core STP, the section area is 1.5mm2, there is no polarity requirement when connection. 3) HBS(master unit serial signal): get state signal of slave units. 4) Count (pulse signal): use two-core RVVP shielded wire, the section area is1.0mm2, there is polarity requirement when connection. 5) HBM (HOMEBUS communication): use two-core RVVP shielded wire, the section area is1.0mm2, there is no polarity requirement when connection. 2.4 Connection among gateways, between gateway and server The gateways are interconnected with two-core STP (the section is 1.5mm2) to make LONWORKS control network. The spec of signal wire is as above. The wiring of signal wires adopts bus type (identical with the communication wires connection between indoor and outdoor). If it is very far from gateway to server, the wires must be shielded and be heat insulated well; and the shielded layer must be connected to the earth wire terminal of the server. 2.5 Exterior appearance & installation method of internet server A. External appearance and definition of port To server bus line 17, 18 connect with server bus line (LON);19 connect with shield layer. Connect with computer G R U P A d.o.o. earth N L wire 114