USER MANUAL [1.4]
Page 26
In Wialon monitoring system, inputs are counted from 1, i.e. in0 in wialon is in1, etc.
1.3 DISCRETE INPUTS
The device has six discrete inputs:
•
two main discrete inputs – IN8 (D8) and IN9 (D9)
•
four universal discrete inputs/outputs – IN0 (U0), IN1 (U1), IN2 (U2), IN3 (U3).
Discrete inputs have an internal pull-up to 3.3V. If input voltage less than 1V – state “1”, else –
state “0”. The allowed input voltage range is 0-33V.
The discrete inputs support several operation modes:
‘Discrete mode’
– shows the input state. when shorted to ground – state “1”, else – state “0”. In
Wialon system, input state is contained in parameter “pin”.
‘Impulse’ mode
– sensors with pulse output (fuel flow sensors, various counters) can be
connected. Up to six sensors can be connected at the same time (IN8 (D8), IN9 (D9), IN0 (U0), IN1
(U1), IN2 (U2), and IN3 (U3)). In Wialon system, impulse state is contained in parameter “imps_X”, X
– input number.
‘Frequency’ mode
– FLSs with frequency output can be connected. Up to six frequency sensors
can be connected at the same time, which allows controlling the fuel consumption of vehicles with
multiple fuel tanks (Fig. 5). In Wialon system, frequency state is contained in parameter “freq_X”, X –
input number.
