It features 12 user-selectable data rates from 300 bps up to 460.8 kbps. A Faraday isolator is shown to develop a temperature difference between its input and output, but still complies with the second law when all the heat carriers, in this case, photons are homogeneous and indistinguishable. You get the speed with the RS-422 and RS-485 Optical Isolator/Repeater too. Isolators based on the three best performing materials were then developed and packaged as fiber-in, fiber-out and fiber-in, beam-out. A variety of potential Faraday rotator materials were characterised to identify the most suitable materials for use in the 1700-2100nm wavelength range. By connecting one side of the unit as a 2-wire device and one side as a 4-wire device equipment meant for a point-to-point RS-422 interface can be connected directly to an RS-485 2-wire multidrop system. We report on the development and testing of optical isolators for use in 2-micron fiber laser systems. The RS-422 and RS-485 Optical Isolator/ Repeater operate in either 2-wire half-duplex systems or in 4-wire half-duplex or full-duplex systems.
It supports Transmit Data A and B Receive Data A and B Protective Ground and Signal Ground. The RS-422 and RS-485 Optical Isolator/Repeater use terminal blocks on each side of the device. All data lines as well as power and ground are isolated from one side of the unit to the other. Additionally, Faraday mirrors and tools for polarization management allow the polarization state of light travelling through the fiber to be altered, and optical isolators are available to help protect. It can be used to optically isolate one piece of RS-485 equipment from the rest of an RS-485 system or one local group of RS-485 equipment from another or it can be used as a repeater to expand an existing RS-485 system beyond the standard's 32-node limitation. Fiber couplers, WDMs, combiners, circulators, and optical switches provide fundamental building blocks for fiber-based optical circuits. The BLACK BOX(r) RS-422 and RS-485 Optical Isolator/Repeater enable you to connect equipment meant for a point-to-point RS-422 4-wire interface to an RS-485 2-wire multidrop system. This compact device links RS-422 4-wire and RS-485 2-wire systems while using optical isolation to protect equipment and lines from damaging ground loops. Features 12 user-selectable data rates up to 460.8 kbps. Operates 2-wire half-duplex or 4-wire half- or full-duplex. It can be used as a repeater to expand an RS-485 system beyond 32 nodes. Connects point-to-point RS-422 4-wire equipment to an RS-485 2-wire multidrop system. Isolates one RS-485 device from the rest of an RS-485 system or one local group of RS-485 equipment from another. The optical repeaters/isolators add 4,000 feet (1.2 km) and another 32 nodes to an RS485 data circuit.
0 kommentar(er)
