Gree GMV BACnet Manuale tecnico e di servizio - Pagina 9
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the routing shown is for reference only.
3.2 COMMUNICATION CONNECTION
BACnet gateway communication system includes：
（1）The communication between BACnet gateway and BMS;
（2）The communication between BACnet gateway and AC units.
3.2.1 MATERIAL SELECTION FOR COMMUNICATION LINE
（1）Model selection of BACnet gateway and BMS communication line shall use standard
Ethernet communication line, the length of network cable between gateway and router (computer,
switchboard, etc.) shall not exceed 80m;
（2）Communication line model selection for BACnet gateway and AC unit
Wire type
Light-weight/normal
PVC jacket twisted
copper wire(RVV)
3.2.2 COMMUNICATION CONNECTION METHOD
（1）Communication connection between BACnet gateway and BMS.
（2）Communication connection between BACnet gateway and AC units (n is the quantity of
ODU system, n ≤ 16);
Notice! All communication connection lines under BACnet gateway must be in series
connection, star connection shall not be adopted.
GMV BACnet Gateway Technical Service Manual
Communication
line between
Wire diameter(mm
gateway and
AC units(m)
L
500
2
)
Wire standard
GB/T
2
0.75
5023.5-2008
6
Remark
Total communication
length shall not exceed
500m