MARWIS-UMB
Operating Manual V 3.3 / 9 Dec 2019
9.3 Supply voltage
The sensor is powered by direct current voltage of 12 – 28 VDC.
With temperatures below -10°C (14 °F) and a power supply of 12V a 12v to 24Vstep up convert -
er should be used in order to allow for the necessary heating performance.
9.4 RS485-interface
The device is equipped with a half duplex 2 wire RS484 interface for configuration, measure-
ment retrieval and firmware update.
The MARWIS-UMB sampling rate can be adjusted in steps of 0.1 s to values between once per
0.1 s and once every 5 seconds. The STARWIS-UMB sampling rate can be adjusted steps of 1
second to values between once per second and once every 60 seconds. If the data are not
retrieved more often than once per second the bit rate of 19200 baud will usually be sufficient. If
the sampling rate is higher than that a baud rate of 115200 is recommended.
9.5 Bluetooth connection
For setting up a Bluetooth connection follow the instructions of the producer of the device to
which you want to connect the MARWIS-UMB / STARWIS-UMB (iPad, Windows-PC...)
Then look for your MARWIS-UMB / STARWIS-UMB in the Bluetooth settings. It will register with
the first two sections of its serial number.
If you are using the UMB Config Tool select the COM port for communicating with the MARWIS-
UMB / STARWIS-UMB that has been assigned to your Bluetooth connection during the setup.
30
Chapter 9, Connections
