GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
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3. BACnet Gateway Topology
As shown in the topological diagram below, the whole system consists of the internal network of the air
conditioning unit and BACnet/IP network through which the communication data can be exchanged.
In the network above, L3 is the line for RJ45 and L2 is the twisted pair line.
Note: the total length of L2 can not exceed 500 m and a matched resistance shall be added at both ends.
4. Hardware
4.1 BACnet Product Overview
BACnet gateway kits MG30-24/D2(B) are intended to realize the data exchange between the air
conditioning unit and BAS, and providing 8 I/Os (four inputs are E0, E1. E/A2, E/A3 and four outputs are
E/A4, E/A5, A6, A7). E0 is the fire alarm interface. The status of other I/Os is mapped to the specific
objects of the BACnet/IP bus and is defined by the user.
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