1000ft rs232 serial

More items related to this product. Southwire ft. Non Metallic Electrical Wire - White 5. You may also like. Ratings and Reviews. Most relevant reviews See all 10 reviews. Stock: Only 1 left. Add to cart Notify me. Share this product. It formally defines the signals connecting between a DTE data terminal equipment such as a computer terminal, and a DCE data circuit-terminating equipment or data communication equipment , such as a modem.

The RS standard is commonly used in computer serial ports. The standard defines the electrical characteristics and timing of signals, the meaning of signals, and the physical size and pinout of connectors. Subscribe to our newsletter Be among the first to hear about new product launches, discount codes and more!

Note: the X-Series rack panels are not included and need to be purchased separately as required. Audio: No. Info Accessories Related Questions Reviews. Data transfer can start at any given time and it is the task of the receiver to detect when a message starts and ends. Asynchronous communication has some advantages and disadvantages which are both discussed in the next paragraph. The RS standard describes a communication method where information is sent bit by bit on a physical channel.

The information must be broken up in data words. The length of a data word is variable. This length is the net information length of each word. For proper transfer additional bits are added for synchronization and error checking purposes. It is important, that the transmitter and receiver use the same number of bits. Otherwise, the data word may be misinterpreted, or not recognized at all. With synchronous communication, a clock or trigger signal must be present which indicates the beginning of each transfer.

The absence of a clock signal makes an asynchronous communication channel cheaper to operate. Less lines are necessary in the cable. A disadvantage is, that the receiver can start at the wrong moment receiving the information. Re-synchronization is then needed which costs time. All data received in the re-synchronization period is lost. Another disadvantage is that extra bits are needed in the data stream to indicate the start and end of useful information.

These extra bits take up bandwidth. Data bits are sent with a predefined frequency, the baud rate. Both the transmitter and receiver must be programmed to use the same bit frequency. After the first bit is received, the receiver calculates at which moments the other data bits will be received.

It will check the line voltage levels at those moments. With RS, the line voltage level can have two states. The on state is also known as mark, the off state as space. No other line states are possible. When the line is idle, it is kept in the mark state. RS defines an asynchronous type of communication. This means, that sending of a data word can start on each moment.

If starting at each moment is possible, this can pose some problems for the receiver to know which is the first bit to receive.