What is the minimum current that must be supplied to a loop-powered device in a 4 to 20 mA loop?
A. 0 mA
B. 4 mA
C. 8 mA
D. 12 mA
Answer:B
What is the minimum current that must be supplied to a loop-powered device in a 4 to 20 mA loop?
A. 0 mA B. 4 mA C. 8 mA D. 12 mA
Explanation: In a 4 to 20 mA loop, the minimum current that must be supplied to a loop-powered device is 4 mA. This is the current that represents the lower range of the measured variable. Any current below this level may be interpreted as a fault or failure in the loop.