Delta OHM HD32MT.3, Руководство по эксплуатации

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HD32MT.3
- 11 -
V1.2
If enabled (see the command MBENABLE in paragraph 11.20), the Modbus-RTU protocol is
activated after 60 seconds from the data logger power up or reset. During the first 60 sec-
onds from power up or reset, the proprietary protocol is active (serial commands of chapter
11).
For connection to a PC, the CP24 USB/RS485 adapter cable can be used to be connected
to the M12 connector located on the bottom of the case.
Up to 4 sensors (with address from 1 to 4), whose measurements (up to 8 for each sensor) are
acquired every 10 seconds, can be connected to the SDI-12 line.
3. RS485 communication port with Modbus-RTU protocol (COM SENSORS) adapted for the
connection of Delta OHM sensors.
Terminal
number
Function
9 DATA-
10 DATA+
11 GND
The sensors to be connected must be configured according to communication parameters
19200 bit/s, 8E1 and with the Modbus address indicated in the table below:
Sensor Address
Anemometer HD52.3D… series 1
Pyranometer LP PYRA…S 2
Temperature and humidity transmitter HD9008.T17S
Temperature transmitters HD9008.T7S and HD48S07TFP
3
Sunshine duration sensor LP SD18.1 4
Soil temperature probe TP32MTT.03 5
Barometer HD9408.3B.1 or HD9408.3B.2 6
Rain gauge HD2016 7
Soil moisture probe HD3910… 8
Anemometer HD2003… series 9
4. Switched power supply output +Vsw1 and +Vsw2. Their value is the same as the power
supply input, but they are active only during the measurement acquisition phase.
Terminal
number
Function
12 +Vsw1
13 GND
14 +Vsw2
+Vsw1 output is used to power sensors with RS485 Modbus output.
5. INA, INB and INC analog inputs. Each of the three analog inputs can work as voltage input
0...1 V or 0...10 V, or as current input 0...20 mA or 4...20 mA.
Terminal
number
Function
15 GND
16 +INA
17 +INB
18 +INC
19 GND