Engine_2014 : Electricity - 428/2299
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| As shown in the figures "A" and "B" of the illustrated RS-232 Synchronous Serial DB-25 connector, what pin is used as the common signal return path pin during serial communications? |
| A) pin 1 |
| B) pin 2 |
| C) pin 3 |
| D) pin 7 |
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Illustration EL-0084
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