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What Are The Benefits Of 4-20 Ma Signals? |
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Answer» Analog 4-20 mA SIGNALS have the following advantages: The same two-wires carry both the sensor power and signal; 4-20 mA is easily converted to a 1-5 VDC input VIA a 250 Ohm Watt resistor or 1-10 VDC input via a 500 Ohm Watt resistor; 4-20 mA is low current and therefore has a low heating LOSS through the signal wire; and with SHIELDED cable, 4-20 mA is noise resistant to radiated and inducted interference. Analog 4-20 mA signals have the following advantages: The same two-wires carry both the sensor power and signal; 4-20 mA is easily converted to a 1-5 VDC input via a 250 Ohm Watt resistor or 1-10 VDC input via a 500 Ohm Watt resistor; 4-20 mA is low current and therefore has a low heating loss through the signal wire; and with shielded cable, 4-20 mA is noise resistant to radiated and inducted interference. |
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