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BACnet
®
Gateway for VRF System
Check that the power supply voltage is within the specified range. If the power supply voltage outside the specification is input,
it will causetrouble.
Recheck the wiring. Incorrect wiring will cause trouble.
Connect to BACnet
Connect the communication cable coming from the network hub or switch to the Ethernet port (Figure above) of the
gateway. The cable to be used depends on where the gateway is connected:
•
Connecting directly to a BACnet/IP device: a straight Ethernet UTP/STP CAT5 cable
•
Connecting to a hub or switch of the LAN of the building: a straight Ethernet UTP/STP CAT5 cable
In case there is no response from the BACnet devices to the frames sent by gateway, check that they are operative
and reachable from the network connection used by the gateway. Check the gateway Ethernet interface sending
Pings to its IP address using a PC connected to the same Ethernet IP network. If the problem persists communicating
through the LAN of the building, contact the network administrator and make sure traffic on the port used is allowed
through all the LAN path.
The BACnet
®
Gateway for VRF System comes with DHCP functionality enabled by default.
Connect to Fujitsu interface
Use the LON connector in the left bottom corner of the gateway in order to connect the VRF network to the UTY-
VBGX. Remember to follow all safety precautions indicated by Fujitsu.
Modifying some other parameters can affect proper communication.
UTY-VBGX
(LON terminal block)
Cable
(Three wires)
A
B
SGND
NOTE: Torque to be applied on the LON connector screws (A,B,SGND) is 0.5 Nm
Tighbten the terminal screws to the specified torques, otherwise, abnormal overheating may occur and possibly cause heavy
damage inside the unit.
• To peel the sheath form the lead cable, use a dedicatied tool that will not damage the conductor cable.
• When installing a screw on the terminal block, do not cut the cable by overtightening the screw. On the other hand, under
tightened screw can cause faulty contact, which will lead to a communication failure.
CAUTION
C2
VRF network connection through LON
-
+
WARNING
CAUTION
Copyright© 2010-2017 Fujitsu General Limited - All rights reserved
INSTRUCTION MANUAL r1.3.2 eng
VRF network
Cable
(Three wires)
-
A
+
B
SGND
85/103
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