C
LEAR
P
ATH
U
SER
M
ANUAL
R
EV
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1.97
26
HLFB
W
IRING
E
XAMPLES
HLFB Output Wiring Examples
PLC Input
ClearPath Internal
HLFB +
HLFB -
Current
Limiter
5-24VDC
(Return)
5-24VDC
(Supply)
IN +
IN -
ClearPath Internal
HLFB +
HLFB -
Current
Limiter
5-24VDC
(Supply)
Microcontroller
Digital Input
Pull-up resistor
(1k - 20k typical)
IN
GND (Return)
Tips on microcontroller inputs
• Because it's not possible for us to describe every possible
microcontroller input type, be ready to experiment a bit to find
the right resistor for your application. If you're not sure what
value of pullup resistor to use, try a 10k resistor.
• Check your microcontroller documentation to see if the inputs
already have internal pullup resistors before adding an
external pullup. Most Arduinos, for example, let you "turn on"
or "turn off" internal pullup resistors with a simple line of
code. See link below for more information on Arduino puts.
o
learn more, try this Google search: pull up resistor for digital
in
• If you don't know what a pullup resistor is and would like t
input.
Arduino on the Web
For more information related to Arduino digital inputs and pullup
resistors, check out the following link:
https://www.arduino.cc/en/Tutorial/DigitalPins
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EKNIC
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(585)784-7460
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OICE
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