Connection To Bacnet - HMS Networks Intesis IN700-485 Series User Manual

IN700-485 Series

11.4. Connection to BACnet

• Ethernet connection for BACnet IP
Connect the BACnet IP network to the Ethernet port of the gateway. The correct cable to use depends on
where the gateway is connected:
– Connecting directly to a BACnet IP device: use a crossover Ethernet UTP/FTP CAT5 or higher cable.
– Connecting to a hub or switch of the LAN of the building: use a straight Ethernet UTP/FTP CAT5 or higher
cable.
IMPORTANT
If there is no response from the BACnet devices to the frames sent by the 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 network.
– Contact the network admin to be sure there are no limitations regarding UDP communication or
ports blocked.
IMPORTANT
If communicating through the LAN of the building, contact the network administrator and make
sure traffic on the used port is allowed through all LAN paths.
NOTE
After powering up the Intesis gateway for the first time, DHCP will be enabled for 30 seconds.
After that time, if a DHCP server provides no IP, the default IP 192.168.100.246 will be set.
• Port B EIA-485 connection for BACnet MSTP
Connect the EIA-485 bus to connectors B1 (B-), B2 (A+), and B3 (SNGD) to the Port B of the gateway.
IMPORTANT
Respect the polarity.
IMPORTANT
Remember the characteristics of the standard EIA-485 bus:
– Maximum distance of 1200 meters.
– Maximum of 32 devices connected to the bus.
– A termination resistor of 120 Ω is needed at each end of the bus. The gateway has an internal
bus biasing circuit already incorporating the termination resistor. It can be enabled using the
DIP switches:
• Position 1
ON: 120 Ω termination active
OFF: 120 Ω termination inactive
• Position 2-3
ON: Polarization active
OFF: Polarization inactive
IMPORTANT
If the termination resistor is enabled and you install the gateway at one of the ends of the bus, do
not install an additional termination resistor at that end.
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Connection to BACnet
USER MANUAL Version 1.0