Electrical characteristics of 9-pin RS232 connector, Computer Networking

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Q. Electrical Characteristics of 9-Pin RS232 Connector?

Electrical Characteristics

1865_Electrical Characteristics of 9-Pin RS232 Connector.png

- Single-ended

One wire per signal and voltage levels are with respect to system common (that is signal ground)

- Mark: -3V to -15V

Represent Logic 1 Idle State (OFF)

- Space: +3 to +15V

Represent Logic 0 Active State (ON)

- Typically swing between -12V to +12V

- Suggested maximum cable length is 15m at 20kbps

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