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LOGO! Manual
A5E00380835-01
Note
Fluctuating analog values are due to screening on the con-
necting wire from the analog valuator device to the analog
AM 2 / AM 2 PT100 LOGO! expansion module (encoder
wire) that has either been mounted incorrectly or not at all.
To avoid fluctuating analog values when using these ex-
pansion modules, proceed as follows:
Use only shielded encoder wires.
Shorten the encoder wire as much as possible. The
encoder wire must not be more than 10 meters long.
Clamp the encoder wire on one side only and clamp it
only to the PE terminal on the AM 2 / AM 2 PT100 ex-
pansion module.
Connect ground on the encoder supply to the PE termi-
nal on the expansion module.
Avoid operating the LOGO! AM 2 PT100 expansion
module on a power supply that is not grounded (poten-
tial–free). If you cannot avoid this, connect the negative
output/ground output on the power supply to the shiel-
ding on the resistance thermometer’s measuring wires.
LOGO! installation and wirin
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