ME401-2
M-Tec ME401-2, Technical Manual v.1.3a, September 2012
Page 11
Digital inputs
The activation of a digital input requires a minimum high level voltage of 8V.
Digital output
The digital output has the type indication ”LO-side switch”, that connects the output to 0V
“ground”, when the output is active. This output can be used to control a relay powered
from an external DC supply voltage. The maximum current drawn from the output is
200mA and the voltage from the external supply voltage must not exceed 40V DC.
The output is protected against short circuits, overload and is also protected against over
voltage. For further information about connection possibilities of the digital output, see
chapters about installation later in this manual.
Motion sensor
The unit has a built-in motion sensor that is able to activate the unit if it, as a consequence
of disconnected supply voltage, is in stand-by mode. When motion is detected it will also
cause activity on ‘Input 3’ on the Trackunit portal.
1-Wire input
The 1-wire (Green wire) is designed to communicate with temperature sensors based on
the DS18B20 or DS18S20 sensor.
The 1-wire input can also be used to read Dallas iKey for access control.
The 1-wire input is only operational when supply voltage (12V / 24V) is present.
It cannot operate on internal battery alone.
