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LOGO! installation and wiring
2.3 Wiring LOGO!
LOGO!
54
Manual, 04/2011, A5E03556174-01
LOGO! AM2 PT100
You can connect a maximum of two 2-wire or 3-wire PT100 sensors or one 2-wire plus one
3-wire PT100 sensor to the module. Note that the sensor type supported by the module is
only PT100 with the default temperature coefficient of α= 0.003850.
For a 2-wire connection, you need to short-circuit terminals M1+ and IC1 or M2+ and IC2.
Errors caused by the ohmic resistance of the measuring line are not compensated for this
type of connection. A line resistance of 1 Ω is proportional to measuring error of +2.5 °C.
A 3-wire technique suppresses the influence of the cable length (ohmic resistance) on the
result of the measurement.
37
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Summary of Contents for LOGO!
Page 8: ...Preface LOGO 8 Manual 04 2011 A5E03556174 01 ...
Page 278: ...LOGO functions 4 4 Special functions list SF LOGO 278 Manual 04 2011 A5E03556174 01 ...
Page 366: ...Abbreviations LOGO 366 Manual 04 2011 A5E03556174 01 ...
Page 372: ...Index LOGO 372 Manual 04 2011 A5E03556174 01 ...
Page 534: ...Index Basic Panels 162 Operating Instructions 04 2012 A5E02421799 03 ...