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As shown in figure "B" of the illustrated block diagram for a central operating system configured for supervisory control, what is becoming the industry standard for transmission of analog signals for a measured variable? EL-0094 |
A) -10 volts to +10 volts |
B) 1 volt to 5 volts |
C) 4 milliamps to 20 milliamps |
D) 10 milliamps to 50 milliamps |
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Illustration EL-0094Comments |
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