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Connecting sensors to the Pulse I/O card
Wiring the Pulse input
Each Pulse I/O card provides one pulse input for connecting devices such as rate pulsing flow meters. The
pulse input terminals available on each Pulse I/O card are shown in the diagram below.
Cable length guidelines
l
Wherever possible sensors should only be grounded at the XCi device end.
l
Long pulse cable input runs require proper grounding and minimisation of ground loops.
l
For sensors powered by +5V, cable lengths <10m are recommended.
l
For sensors powered by +12V, cable lengths <100m are recommended.
Power guidlelines
Because pulse rate sensors are often left running continuously, their power consumption in an important
consideration.
l
A continuously running sensor should have a current consumption
<10mA
.
l
Sensors using
>10mA
require a larger solar panel (eg. 10 Watts).
l
Sensors using
>50mA
should also have an external battery or mains power.
NOTE: Sensors connected to the Pulse I/O card can be configured to switch ON/OFF
to save power rather than run continuously. See
Add a new "Flowrate (using pulse)"
After completing the wiring, configure the sensor using (see
Add a new "Flowrate (using pulse)"
)
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Summary of Contents for HydroMace XCi
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