2.4. OUTPUTS
connected to the
start
position which gives energy to the vehicle’s
start engine as this position is ON only for a short period of time.
The unit’s ignition sense can be directly connected to the electrical
end of this position. See the
Connection Diagrams
section for an
illustration.
2.4
Outputs
The unit has 4 discrete outputs located on the I/O molex-type con-
nector.
The outputs are
Open-Drain
type with no internal pull-up resistor.
Meaning that the user has to provide a pull-up resistor to any positive
voltage (
30V
max.) to detect an inactive output by voltage. Each
output can drive a continuous current of 2A.
The electrical conditions are:
Logical State
Electrical state
Active
0V
Inactive
Open or the pull-up voltage (max
30V
)
If the output is used for cutting/restoring GND, a direct connection
can be used. For example when driving a LED:
If the output is used for cutting/restoring a positive voltage on a high
current device, like for example the vehicle’s ignition wire, an external
device like a relay o high current transistor has to be used. See the
Connection diagrams
for an illustration.
38
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