VM1000 Series
‐40‐
（3）Wiring Standard of Control Terminal
According to the input signal and internal design of terminals, there are A, B, C
three conditions as following.
A： Analog input terminal
Weak analog voltage signals are easy to suffer external interference, and therefore
the shielded cable must be used and the cable length should be less than 20 m, as
shown in following picture2-17.In applications where the analog signal suffers
severe interference, install filter capacitor or ferrite magnetic core at the analog
signal source,as shown in following picture 2-18.
Figure 2-17 Analog input terminals
Figure 2-18 Analog input terminals handling
+10V
AI1
GND
PE
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