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2022/04/11
Page : 12
5
I
NTERFACE DESCRIPTION AND
P
IN
L
AYOUT
5.1
M
ICRO
-USB
C
LIENT
The Micro-USB client interface is used for configuration only.
USB in “4.0 Sky”
products
USB Client in “4.0 Silver” products
Most Avisaro devices are powered through the Mico-USB client port, however only for configuration. A
stable regular operation is not guaranteed. Use the regular power supply for normal operation.
A “Micro USB” cable is used. As those cable are widely avail
able, this cable is not part of scope of
delivery to avoid electronic waste.
Heads-up:
There are sometimes Micro USB cable which only do power supply, but not data. Those are
used i.e. with mobile phones. If the Avisaro device is powered, but no data connection to the PC
–
just
choose a different USB cable.
5.2
A
NALOG
4..20
M
A
CURRENT LOOP INTERFACE
The analog 20mA interface is a differential current input with an internal resistance of 49.9 Ohms. This
allows to interface industrial standard 4…20mA sensors to the data logger.
5.2.1
Default 20mA settings
Input resistor: 49.9 Ohm
Measurement range: 0 .. 20 mA
To avoid sensor signal clipping, the voltage levels of analog channels must be kept within the range:
negative Pin Voltage ≥ 0V
positive Pin Voltage ≤ 3V referenced to GND
5.2.2
2-wire and 3-wire setup considerations
