클잼 로고

• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

Conformal Coating, cable, and connectors, are factory options. Circuits may be terminated on screw terminals, D-subminiature connectors, or other types of connectors. User connections are an RJ11/12 telephone style for the RS232, a 3 pin removable screw terminal strip for the RS485 port, and a 2.1 mm barrel connector, or a 3 pin screw terminal strip for the power. Accessories available are a 12VDC Switching Power Supply(Wall Wart), an enclosure, and a 7ft DB9F to RJ11/12 RS232 cable. And that with an interface which does not require intelligent network hardware: the implementation on the software side is not much more difficult than with RS232. The recommended arrangement of the wires is as a connected series of point-to-point (multidropped) nodes, i.e. a line or bus, not a star, ring, or multiply connected network. A simple network of a PLC, VFD, and an HMI allows remote control of motors in an industrial setting. This is possible since the HMI is connected to your PLC via RS485. All in all, RS485 really allowed full automation possible with its ability to connect so many devices at once. With RS485 communication distances of 1200 m are possible. Differential signals and twisting allows RS485 to communicate over much longer communication distances than achievable with RS232.

RS232 could only handle one. This allowed users in manufacturing facilities to connect larger applications and whole machines with one protocol. This allowed for electrical noise to cause interference. Because of the differential signal, any noise is subjected externally to the cable is basically subjected to both cables. First of all we see that the speed of the differential interfaces RS422 and RS485 is far superior to the single ended versions RS232 and RS423. Their main difference boils down to one having only support for RS485, while the other one supports RS232 and TTL as well. RS232 could only handle one at a time. You aren’t limited to fifty feet of cable like with RS232. The maximum RS485 cable length is typically listed as 1200 meters or about 4000 feet. Users can utilize a longer cable, up to 1200 meters or 4000 feet. The greatest feature of RS485 is the fact that you can connect up to 32 devices on one system. One very common example in the automation world is remote control of VFDs or Variable Frequency Drives.

The transmitter and receiver compare the voltages of the data- and handshake lines with one common zero line. R E Smith, Inc. engineers and manufactures a comprehensive line of isolated and non-isolated converters, repeaters, multiport repeater hubs, fiber optic based products, and I/O boards. R E Smith Inc makes a wide variety of isolated converters that address the electrical noise problems that contribute to unreliable communications, and product failure. Electric noise can cause all kinds of problems for electronics. Several volts difference in the ground level of the RS485 transmitter and receiver does not cause any problems. Typical uses are very large networks, monitor and control of elevators, machinery, lighting, security, fire and alarm, access, cameras, military ground support, and much more. RS232 referenced ground to decipher the data it was transmitting. It is faster and much more versatile than the older RS232. Much like RS232, RS485 doesn’t have an actual standard connector.

Most manufacturers still utilize a DB-9 connector. You can also still simply use a terminal strip. You may be wondering, what can I do with serial communications, especially RS485. Just like it’s older brother RS232, RS485 is a form of serial communication. This helped RS485 become a widely used and very versatile form of serial communication. There are different serial communication standards such as RS232, RS422 and RS485. Ultimately, it can be thought of in a way that serial communication is more made for this usage as compared to the common USB and ethernet. It requires minimal wiring and can share the wiring among several seats, reducing weight. B- lines, representing a two-wire half-duplex configuration, which is the most commonly used wiring method in RS485. This makes utilizing RS485 simple. Utilizing a series of dedicated interface devices, it allows PCs and industrial controllers to communicate. It also allows manual flow control if needed.

In the event you adored this information along with you wish to acquire guidance with regards to what is rs485 cable i implore you to visit our web page.