DTU4x0 GPRS/NB-IoT Data Loggers
User Guide. r. 2.01 | 2022-05-17
Tel.: +420 234 076 670
12
e-mail: [email protected]
•
1-Wire sensor
-
the type of input used when connecting an ADGT DS18B20
temperature
sensor to data logger. When the input is selected, a software configurable
5V
power output
of the
Vout
terminal block becomes active and turns on with an input polling frequency.
The
output can be configured as permanently active via
DTU Configuration Tool
software.
Connection. Combine red (
power)
and black
(ground)
wires together and connect to
GND
contact of the
GPIO
terminal block. Connect the yellow DQ wire (
data line)
to any of the
P1-
P4
pins. The sensor receives power from the data line (in "parasitic" mode).
•
Current loop sensor
– the type of input used when connecting 4-20 mA current sensors to
data logger. When this input is selected, a 100 Ohm load resistor is switched on at the input,
and the
12V
and
7.5V
power outputs of the
Vout
terminal block automatically become active
to enable power supply of current loop sensors. Outputs are software configurable. You can
configure them as permanently active via
DTU Configuration Tool
software.
The sensor can be connected in accordance with the following diagram:
−
The sensor is powered from the built-in data logger power supply. The 4-20mA output of
the sensor is connected to any of the
P1-P4
inputs, and the
+Upow
output is connected
to one of the DTU power outputs
-
7.5V
or
12V
.
CAUTION!
Do not power 4-20 sensors from external power sources – it may cause damage of DTU input.
It is allowed to p
ower
the sensors only from the data logger according to a diagram above.
