IC-MN Datasheet, PDF (57/59 Pages) IC-Haus GmbH – 25-BIT NONIUS ENCODER WITH 3-CH. SAMPLING 13-BIT Sin/D INTERPOLATION

iC-MN 25-BIT NONIUS ENCODER
WITH 3-CH. SAMPLING 13-BIT Sin/D INTERPOLATION
APPLICATION NOTES: PLC Operation
Rev D1, Page 57/59
PLC Operation
There are PLCs with a remote sense supply which re-
quire longer for the voltage regulation to settle. At the
same time the PLC inputs can have high-impedance
resistances versus an internal, negative supply voltage
which define the input potential for open inputs.
In this instance iC-MN’s reverse polarity protection fea-
ture can be activated as the outputs are tristate during
the start phase and the resistances in the PLC deter-
mine the pin potential. During the start phase nei-
ther the supply VDD nor the output pins, which are
also monitored, must fall to below ground potential (pin
GND); otherwise the device is not configured and the
outputs remain permanently set to tristate.
In order to ensure that iC-MN starts with the PLCs
mentioned above pull-up resistors can be used in the
encoder. Values of 100 kΩ are usually sufficient; it
is, however, recommended that PLC specifications be
specifically referred to here.