Panasonic AFPE224300 User Manual page 37

- Precaution when using two-wire type sensor
I : Sensor's leakage current (mA)
R: Resistance of the bleeder resistor (kΩ)
The OFF voltage of the input is 2.4V. Determine the value of bleeder resistor "R" so that
the voltage between the COM terminal and the input terminal will be less than 2.4V.
The wattage (W) of the resistor is:
Normally, use a value that is 3 to 5 times determined for the value of "W."
- Precautions when using LED-equipped limit switch
r : Internal resistor of limit switch
R : Resistance of the bleeder resistor (kΩ)
The OFF voltage of input is 2.4V. When the power supply voltage is 24V, determine the value
for the bleeder resistor "R" so that the current will be greater than "I" as shown below:
"R" of the bleeder resistor is:
The wattage (W) of the resistor is:
Normally, use a value that is 3 to 5 times determined for the value of "W."
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When the input of FP-e does not turn off
because of leakage current from the
two-wire type sensors (e.g. photoelectric
sensor and proximity sensor), the use of
a bleeder resistor is recommended, as
shown in the diagram on the left.
The formula below is based on an input
impedance of 5.6 kΩ The input
impedance varies depending on the
input terminal number.
If the input of FP-e does not turn off
because of the leakage current from
the LED-equipped limit switch, the use
of a bleeder resistor is recommended
as shown in the diagram on the left.
(kΩ)
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