MKS 907 Series, Инструкция по эксплуатации

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4 Installation
20
Series 907 Analog Convection Transducer
Instruction Manual - #109070001
4.3.2 Inductive Loads and Arc Suppression
If the set point relay is used to switch inductive loads, e.g., solenoids, relays, transformers, etc., the
arcing of the relay contacts might interfere with controller operation or reduce relay contact life.
Therefore an arc suppression network is recommended. The values of the capacitance C and the
resistance R can be calculated by the equations,
C = I
2
/(1 x 10
7
) and R = E/I
a
where,
C is in farads
R is in ohms
I is DC or AC
peak
load current in amperes
E is DC or AC
peak
source voltage in volts
a = 1 + (50 /E )
Note that:
R
min
= 0.5
Ω
and C
min
= 1.0 x 10
-9
F.
Figure 4-2: Relay Arc Suppression Network