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You should upgrade or use an alternative browser. Full Member. Nov 14, South Texas. I've tried the contact page, but haven't heard back from the. Does anyone know if this works with a vector 21, or just the plrf10 and 15? I believe the Vectronix brand works with them all. But unknown on this one. TacticalDillhole Shiner of shoes Supporter.
This is a simple modem used to increase the maxim distance you can run RS data. Making sense of the specifications Selecting data cable isn't difficult, but often gets lost in the shuffle of larger system issues. Care should be taken. Beyond the obvious traits such as number of conductors and wire gauge, cable specifications include a handful of less intuitive terms. Characteristic Impedance Ohms : A value based on the inherent conductance, resistance, capacitance and inductance of a cable that represents the impedance of an infinitely long cable.
When the cable is out to any length and terminated with this Characteristic Impedance, measurements of the cable will be identical to values obtained from the infinite length cable. That is to say that the termination of the cable with this impedance gives the cable the appearance of being infinite length, allowing no reflections of the transmitted signal.
If termination is required in a system, the termination impedance value should match the Characteristic Impedance of the cable. Systems with long lengths benefits from using low capacitance cable. The value given typically must be multiplied by the speed of light c to obtain units of meters per second. Plenum cable Plenum rated cable is fire resistant and less toxic when burning than non-plenum rated cable. Check building and fire codes for requirements. Plenum cable is generally more expensive due to the sheathing material used.
The specification recommends 24AWG twisted pair cable with a shunt capacitance of 16 pF per foot and ohm characteristic impedance. It can be difficult to qualify whether shielding is required in a particular system or not, until problems arise. We recommend erring on the safe side and using shielded cable. Shielded cable is only slightly more expensive than unshielded. There are many cables available meeting the recommendations of RS and RS, made specifically for that application.
Another choice is the same cable commonly used in the Twisted pair Ethernet cabling. Category 5 cable is available as shielded twisted pair STP as well as unshielded twisted pair UTP and generally exceeds the recommendations making it an excellent choice for RS systems. In this document the term RS will be used when refered to this serial interface. As said before RS is a serial interface. It can be found in many different applications where the most common ones are modems and Personal Computers.
All pinning specifications are writen for the DTE side. To make a destiction between all different types of cables we have to use a naming convention. RS can be found on different connectors. There are special specifications for this. All signals are measured in reference to a common ground, which is called the signal ground AB.
A positive voltage between 3 and 15 Vdc represents a logical 0 and a negative voltage between 3 and 15 Vdc represents a logical 1. This switching between positive and negative is called bipolar. The zero state is not defined in RS and is considered a fault condition this happens when a device is turned off.
According to the above a maximum distance of 50 ft or 15 m. This is according to the official specifications, the distance can be exceeded with the use of Line Drivers.
The secondary signals are used on some DCE's. Those secondary channels are mostly of a lower speed than the normal ones and are mainly used for administrative functions. Cable pinning Here are some cable pinning that might be useful. Not all applications are covered, it is just a help:. To Computer. To Modem. To Computer 1. To Computer 2. ARC Electronics Some applications require more pins than a simple async.
Pins used for Synchronous data. RS Specs. RS 25 pin Tail Circuit Cable. Null Modem cable diagrams Nullmodem 9p to 9p Nullmodem 9p to 25p Nullmodem 25p to 25p. Cross Pinned cables for Async data. Third-party applications have done well in enhancing the way we work with RS serial port.
You can find interesting usage scenarios in the User Guide. Electronic Team, Inc. By continuing to use this site, you agree to our cookie policy. Click here to learn more. Olga Weis Aug 19, Main specifications for RS Operation mode: single-ended Max. Here are the obvious limitations of the standard: Increased consumption of power due to large voltage swing is a huge complication for the power supply design. The need for a null modem or crossover cable whenever connecting a peripheral to a computer.
DB9 Pinout and Usage. DCE is ready to receive and send data. Zero voltage reference. Pin S. RS cables specifications There are no cable length limits defined directly by the RS standard, so the main determining factor is the maximum capacitance tolerated by a compliant drive circuit.
RS data flow diagram According to the RS standard, data can be transmitted in lots of variations. Frequently Asked Questions. What does the RS in RS stand for? Does RS play any role in modern computers? Most industrial automation and surveying laboratories continue to use serial port technology in spite of its limitations. The re-introduction of DB-9M connector on the Tecra personal computer by Toshiba proves that these standards are here to stay for now.
Despite their differences both USB and RS standards support most software programs in major operating systems. Get a download link for your desktop Submit your email address to get a link for quick download on your desktop and get started!
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