FP
Σ
Installation and Wiring
5 - 14
Precaution when using LED-equipped limit switch
If the input of PLC 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 below.
r: Internal resistor of limit switch (k
Ω
)
LED-
equipped
limit switch
Bleeder
resistor
COM
Input terminal
Internal circuit
R
Power supply for input
r
FP
Σ
Figure 45: FP
Σ
Precaution when using LED-equipped limit switch
The off voltage of input is 2.4 V, therefore when the power supply voltage is 24 V, select the
bleeder resistor “R” so that
the current will be greater than I =
The resistance R of the bleeder resistor is: R
The wattage W of the resistor is: W =
In the actual selection, use a value that is 3 to 5 times the value of W.
13.44
5.6 x
I
- 2.4
(k
Ω
)
24 - 2.4
r
(Power supply voltage)
2
R
Содержание FP Series
Страница 15: ...FP Functions and Restrictions of the Unit 1 2...
Страница 25: ...FP Specifications and Functions of Control Unit 2 2...
Страница 37: ...FP Expansion 3 2...
Страница 44: ...Chapter 4 I O Allocation 4 1 I O Allocation 4 3...
Страница 45: ...FP I O Allocation 4 2...
Страница 51: ...FP Installation and Wiring 5 2...
Страница 77: ...FP High speed Counter and Pulse Output Functions 6 2...
Страница 133: ...FP High speed Counter and Pulse Output Functions 6 58...
Страница 135: ...FP Communication Cassette 7 2...
Страница 147: ...FP Communication Function 1 Computer Link 8 2...
Страница 169: ...FP Communication Function 2 General purpose Serial Communication 9 2...
Страница 205: ...FP Communication Function 2 General purpose Serial Communication 9 38...
Страница 207: ...FP Communication Function 3 PLC Link Function 10 2...
Страница 232: ...Chapter 11 Other Functions 11 1 Analog Potentiometer 11 3 11 2 Clock Calendar Function 11 4...
Страница 233: ...FP Other Functions 11 2...
Страница 238: ...Chapter 12 Self Diagnostic and Troubleshooting 12 1 Self Diagnostic Function 12 3 12 2 Troubleshooting 12 5...
Страница 239: ...FP Self Diagnostic and Troubleshooting 12 2...
Страница 249: ...FP Self Diagnostic and Troubleshooting 12 12...
Страница 251: ...FP Specifications 13 2...
Страница 323: ...Index FP I 4...
Страница 325: ...FP Record of changes R 2...