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Can't tell the difference between TTL level and RS-485 level?

#通用知识133
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TTL Level#

When the TTL level is set to 0, the voltage is 0V. When it is set to 1, the voltage is 5V.

485 Level#

When the 485 level is set to 0, the VB voltage is greater than the VA voltage. When it is set to 1, the VA voltage is greater than the VB voltage.

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