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Profi
Message
Thermocouples can be directly connected. Use the configuration dialogue to set
the type (J, K, T, R, etc.).
Hint
Cold junction compensation required for the thermocouple is integ-
rated into the device. Enter the compensation channel as the
Refer-
ence Junction
in the
Advanced settings
tab (for the same I/O
module).
Measuring temperatures / resistances at analogue input
Connect resistor or temperature probes with 4-wire technology when possible.
This connection method provides the best results since current path and meas-
uring circuit are separate. Measurement current in 2- or 3-wire connectors flows
through both, or one, measurement lines. Voltage drops on the measuring line can
therefore distort readings.
Several constant-power sources are available within the device to supply power.
These sources deliver 1 mA.
They can measure resistance values of
up to
10
κ
W.
Sensor at a digital input
Digital inputs have two variants:
l
Input for level (detection)
l
Inputs for frequency measurement or counting
208
Delphin Technology AG
Dezember 2015
Profi
Message Manual
Summary of Contents for ProfiMessage
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Page 31: ...ProfiMessage 3 5 4 ADIT 31 Delphin Technology AG Dezember 2015 ProfiMessage Manual ...
Page 32: ...ProfiMessage 3 5 5 ADVT 3 5 6 AMDT 32 Delphin Technology AG Dezember 2015 ProfiMessage Manual ...
Page 33: ...ProfiMessage 3 5 7 DIOT 3 5 8 IOIT 33 Delphin Technology AG Dezember 2015 ProfiMessage Manual ...
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