Microtronics myDatalogNANO, User Manual

Page: 52 / 132

Measurement range 0/4...20mA, max. 25mA
Resolution 6,1µA
Load 170Ω
V
sens
23,8V
max. permissible load of
the sensor 830Ω
Loop current limit 38mA
V
out
3 VDC
7.4.4.2 Voltage 0...2V
Schematic diagram: Universal input in 0...2V voltage mode
Resolution 610µV
U
max
2,5V
Load 680k2
7.4.4.3 Digital modes (digital, day counter, pulse counter, frequency, PWM)
If a universal input is operated in one of the digital modes, a switch contact can be connected directly to the
universal input without an additional energy supply.
Note: Due to the input circuit (see following schematic diagram), a cross current of 4,9µA is
generated for every universal input, that is operated in one of the digital modes, when the switch
contact is open. This increases the energy requirement and reduces the device operating time.
Schematic diagram: Universal input in one of the digital modes
1 myDatalogNANO 2 Equivalent circuit diagram for the switch contact
52 Rev. 02