Operating Manual V25/09.2019
Ventus / Ventus-X / V200A
Chapter 10 Connections 20
10.4 Control line
The respective function can be adjusted using the UMB-Config-Tool. The control line can be
used either to control heating in half or full duplex operation or to control telegram transmission
in full duplex mode. In this case control is possible by means of a volt-free switching contact.
Control line at “high” when control and analog ground are not connected.
Control line at “low” when control and analog ground are short-circuited.
For activation of the SDI-12 mode the control line is to be set to “low”, i.e. control input and
analog ground are to be connected.
10.4.1 Control line disabled
The control line level has no effect.
10.4.2 Heating control
- Heating is disabled when control line is at “high” level, otherwise automatic
- Heating is disabled when control line is at “low” level, otherwise automatic
10.4.3 Control of telegram transmission in NMEA protocol
- Telegram transmission triggered on rising edge of control voltage
- Telegram transmission triggered on falling edge of control voltage
- Telegram transmission while control voltage is “high”
- Telegram transmission while control voltage is “low”
10.5 Connection to ISOCON-UMB (8160.UISO)
Warning: The power supply is not connected to the ISOCON-UMB but is wired directly to the
power supply unit, as the ISOCON-UMB is not designed for the 240W heating duty of the
Ventus
device.
Please pay attention to the ISOCON-UMB operating manual when building the equipment.
10.6 Use of surge protector (8379.USP-V)
Please refer to the connection example in the operating manual when using the surge protector
(Order no.: 8379.USP).
Yellow: RS485
interface B
Figure 8 Connection to ISOCON-UMB
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