STEPPII-55/56-LT H
ARDWARE
DESCRIPTION
V
ERSION
1.01
7.1.2 Special pin description
7.1.2.1 Analog inputs (pin 2, 4)
Analog voltages up to 32 V with 8 bit resolution can be processed and remotely
evaluated by a server application. Pull-up resistor to a constant input voltage allows
for resistive transducers to ground, e.g. fuel sensor or thermistors.
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CONNECTION EXAMPLE FOR ANALOG INPUT 2:
Thus, pin 2 (analog input 2) can be connected to a temperature sensor (a NTC
resistor for instance). It is possible to set a low temperature alarm and a high
temperature alarm (upper and lower values), passed to required temperature.
Passage through these thresholds will trigger an alarm. We recommend to use SMS
as alarm type with the protocol GPIOP (SMS including voltage values and text. It
depends on the user configuration). The SMS can be received on a mobile phone,
modem or any GSM device, see illustrated example in figure below:
Figure 5:
Connection example for analog input 2
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