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How far can you run serial cable?
Maximum cable lengths Cable length is one of the most discussed items in RS232 world. The standard has a clear answer, the maximum cable length is 50 feet, or the cable length equal to a capacitance of 2500 pF.
How far can you run RS232 cable?
40-50 feet
The maximum distance you can reliably run RS-232 signals is 40-50 feet. If you have a device more than 50 feet from the processor the solution is to use an ST-COM module.
How long can you run RS232?
50 feet
The guidelines established by paragraph 3.1 of the RS-232-C standard recommend limiting the cable length to 50 feet or less. The standard does allow the cable length to exceed 50 feet, provided that its total capacitance is less than 2500 pF. No specific cable construction type is recommended in the EIA specification.
What is the distance supported by RS232 protocol?
The RS232 standard does not define a maximum cable length but instead defines the maximum capacitance that a compliant drive circuit must tolerate. A widely used rule of thumb indicates that cables more than 50 feet (15 m) long will have too much capacitance, unless special cables are used.
What is TTL Serial communication?
This method of serial communication is sometimes referred to as TTL serial (transistor-transistor logic). Serial communication at a TTL level will always remain between the limits of 0V and Vcc, which is often 5V or 3.3V. A logic high (‘1’) is represented by Vcc, while a logic low (‘0’) is 0V.
What is the limitation of serial communication?
Drawbacks or disadvantages of Serial Interface ➨It uses less number of lines for transmission between devices. Hence it supports slower speed of transmission. ➨It occupies overhead of about 20% other than useful information. This leads to wastage of bandwidth meant for data trasmission for useless stuff.
Is there a maximum cable length for 5V?
Maximum cable length for 5V or 3.3V I2C, UART, or 1-wire signals over Ethernet and how to increase it? I know similar questions have been asked before ( Maximum cable length for 3.3V UART signals) but I would like to know the answer more specifically for a hobbyist.
What’s the max length of a serial cable?
+150. Capacitance in the cable begins to affect serial communications, typically many manufacturers/devices set a limit of approximatly 15m or 50ft on cable lengths for anything up to 9600 baud, and about 4m for 38.4k.
What’s the maximum voltage of a RS-232 signal?
The ‘1’s and ‘0’s are inverted from each other. The minimum and maximum voltages of RS-232 signals is +/-13V, and only 0 to 3.3V/5V for TTL signals.
What does a 0V serial signal on a microcontroller mean?
TTL serial signals exist between a microcontroller’s voltage supply range – usually 0V to 3.3V or 5V. A signal at the VCC level (3.3V, 5V, etc.) indicates either an idle line, a bit of value 1, or a stop bit. A 0V (GND) signal represents either a start bit or a data bit of value 0.