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FX1N Series Programmable Controllers Inputs 5.
5-4
5.1.3 Diodes and Inputs Connected in Series
Vdrop across the diode Max. 4V
No more than 2 LEDs should be connected in series.
5.1.4 Resistors and Inputs Connected in Parallel
Parallel resistance Rp: FX
1N
= 15k
Ω
. If resistance Rp is less than the stated value, then add
Rb. See equation 1 for Rb calculation.
Alternatively; Current leakage: FX
1N
= 1.5mA. If the current leakage is greater than the stated
value, then add Rb. See equation 2 for Rb calculation.
Parallel LED
S/S
FX
0N
, FX
2N
Extension
block
X
24V
X
0V
S/S
FX
1N
Rb
≤
4Rp
15 - Rp
Eqn 1 :
Rb
≤
6
- 1.5
Eqn 2 :
24V
X
0V
S/S
Rp
Rb