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- RS-232 uses two signal levels to distinguish between a logical "1" and a logical "0"12345. A logical "1" is represented by -12 V and a logical "0" is represented by +12 V1. RS-232 can operate on different bit rates, standard values lie between 110 bit/s and 115200 bit/s1. In RS232 specification, low level -3v to-15v is defined as logic ‘1’ and referred as ‘Marking’ while high level +3v to +15v is defined as logic ‘0’ and known as ‘Spacing’4.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.RS-232 uses two signal levels to distinguish between a logical "1" and a logical "0". A logical "1" is represented by -12 V and a logical "0" is represented by +12 V. RS-232 can operate on different bit rates, standard values lie between 110 bit/s and 115200 bit/s.www.tiepie.com/en/articles/measuring-rs232-signalsRS232 was known as TTL logic and therefore RS232 utilizes the TTL specific 5V and GND logic levels. In this logic “1” ranges from -15 volts to -3 volts whereas logic “0” is ranges from +3 volts to +15 volts which means logic “1” is low voltage and logic “0” is high voltage. Generally logic “0” is around +12 volts and logic “1” is around -12 volts.www.electricaltechnology.org/2020/05/rs232-serial …The RS-232 defines the voltage levels that correspond to logical one and logical zero levels for the data transmission and the control signal lines. Valid signals are either in the range of +3 to +15 volts or the range −3 to −15 volts with respect to the “Common Ground” (GND) pin; the range between −3 to +3 volts is not a valid RS-232 level.www.automation--expert.com/rs232/rs232-voltage-l…In RS232 specification low level -3v to-15v is defined as logic ‘1’ is ON state and referred as ‘Marking’ while high level +3v to +15v is defined as logic ‘0’ as OFF state and known as ‘Spacing’.www.engineersgarage.com/rs232-basics-implemen…Contrary to what you might know from other communication protocols, such as, RS-232 uses negative and positive voltage levels to encode bits in messages. Other protocols encode the digital zero using 0V and represent the logic high state using a positive voltage level, typically 3V or 5V.www.digikey.com/en/maker/blogs/2023/understand…
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