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10 TROUBLESHOOTING
(2) When calculating the terminator R value, connect a resistor R so that 1.3mA
or more flows to the connected resistor in order to satisfy the R2 OFF
current 1.7mA.
Therefore, a value for the resistor R can be calculated by the following
formulas.
I
: I
= z (input impedance) : R (Resistance)
R
Z
I
Z
× z =
R ≤
I
R
<
R
4.3k
Ω
When the resistance R is 3.9k
be calculated by the following formula.
W = (input voltage)
(3) The resistor power capacity is selected to be three to fives times the actual
power consumption, so connect a 3.9(k
terminal.
1.7
× 3.3 = 4.3 (k Ω )
1.3
Ω
, power consumption W of the resistor R can
2
2
÷ R = 28.8
(V) ÷ 3.9k(
Ω
10 - 8
MELSEC-A
Ω
) = 0.2 (W)
)1.0(W) resistor to the problem
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Table of Contents
Troubleshooting
