Panasonic FP3 Technical Manual page 46

3-2. Wiring
J Wiring example for photoelectric sensors
For a photoelectric sensor output configuration, connect as shown below:
16 - input type FP I/O transmitter unit
+
0
24V
-
-
+
24V
Power supply
for sensor
Relay output type
J Notes on two - wire type sensor wiring
The use of a bleeder resistor is recommended if the input is not turned OFF due to leakage current from a two-wire
type sensor.
The OFF voltage of the input is 2.4 V. Therefore, select an R value so that the voltage between the negative(-) terminal
and the input terminal will be less than 2.4 V. The impedance of the input terminal is 4.4 k .
The bleeder resistor R is: R ≦
The wattage W of the bleeder resistor is: W =
Actually, use a value that is 3 to 5 times the value of W.
Two - wire type
sensor
40
1 2 3 4 5 6
- -
+ + +
V
0V
NPN open collector
output type
10.56
(kΩ)
4.4I–2.4
(Power supply voltage)
8 - input type FP I/O transmitter unit
+
0 1 2
24V
-
-
+ +
24V
Bleeder
R
resistor
7 8 9 A B
- - -
+ + +
CC
Universal output type
I: sensor's leakage current (mA)
2
R
3 4 5 6 7
- - -
+ + F.G.
+
C D E F
RS
485
-
RS
- -
+ F.G.
485
V
CC
0V
+
RS
485
-
RS
485