Engine_2014 : Electricity - 305/2299
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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? |
| A) 1volt to 5 volts |
| B) -10 volts to 0volts to +10 volts |
| C) 10 milliamps to 50 milliamps |
| D) 4 milliamps to 20 milliamps |
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Illustration EL-0095
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