Belimo UK24BAC Handbuch Technische Daten - Seite 9
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Operation
Setting the BACnet baud rate
Firmware Upgrade
www.belimo.com
Belimo Gateway MP to BACnet MS/TP
(continued)
The BACnet baud rate is set using the DIP switches under the front cover to the values 9'600,
19'200, 38'400 and 76'800.
The RS485 line must be completed at both bus ends with one resistor each. A suitable 120
element is present in the Gateway which can be switched with DIP switch 1 on the base plate.
The RS485 line can be polarised with two resistors (DIP switches 2 and 3) in order to reduce
interference effects during communications pauses. The biasing is implemented as a rule at one
of the bus ends. Switches 2 and 3 must always be respectively activated or deactivated
together.
Important:
The generally valid guidelines for BACnet MS/TP (RS485) are to be observed!
If required, the firmware of the gateway can be upgraded via USB link. The required Upgrade
Tool can be obtained from Belimo.
Procedure:
1. Disconnect power supply from device
2. Set DIP switch 4 "Programming" to ON
3. Connect the device with the notebook via USB
4. Download of firmware according to special instruction
5. Remove USB cable
6. Set DIP switch 4 "Programming" to OFF
7. Connect power supply to device
T9-UK24BAC • en • v1.9 • 06.2018 • Subject to changes
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