What do LON and DON mean in fiber optic amplifiers

Abbreviation for Lonworks Protocol Lonworks technology provides solutions to many problems in designing, creating, installing, and maintaining a network of devices: networks can be from two to 32,385 devices in size and can be adapted to any occasion, from supermarkets to gas stations, from airplanes to railway coaches, from melting lasers to vending machines, from a single home to a skyscraper. Today, in almost every industrial application, there is a tendency to move away from dedicated control solutions and centralized systems.

Manufacturers are using products based on open technologies, such as off-the-shelf chips, operating systems, and functional modules. These features improve reliability, increase flexibility, reduce system costs, and improve system performance. LonWorks technology accelerates this trend by providing interoperability, advanced technology architecture, rapid product development, and measurable cost savings.

The communication of devices in the LonWorks network is implemented using a standard language for networking called Lontalk. The LonTalk protocol consists of a variety of underlying protocols that allow different devices on the network to intelligently communicate with each other. The LonTalk protocol provides a complete set of communication services, which enables applications in a device to send and receive messages with other devices on the network without knowing the network topology or the network name, address, or other device capabilities.

The Lonworks protocol selectively provides end-to-end acknowledgment, acknowledgment, and priority sending to provide a defined limited number of transactions. Support for network management services enables remote network management tools to interact with other devices through the network, including reconfiguration of network addresses and parameters, applications, reporting network problems, and start-stop applications to reset devices. Lontalk – or the LonWorks system – can communicate on any physical medium, including power lines, twisted pairs, wireless (RF), infrared (IR), coaxial cables, and fiber optics.

While there are many ways to assemble a control network, a flat, peer-to-peer (P2P) architecture is best for automated control. The P2P architecture no longer has the single point of failure inherent in a hierarchical architecture compared to any other hierarchical architecture. In the traditional architecture, information from a device must first be transmitted to the device or gateway in order to pass to the target device.

Therefore, the communication between every two non-** devices includes an extra step, or increased likelihood of failure. The P2P architecture is designed in contrast to allow direct communication between two devices, which avoids the possibility of controller failure and eliminates bottleneck effects. In addition, in a P2P design, device failures are more likely to affect only one device, rather than potentially affecting many devices in a non-flat, non-peer-to-peer architecture.

Don doesn't know

The action state transfer switch indicates that LON is the abbreviation of light on, that is, when the light is on; DON is an abbreviation for Dark On, which is open when shading.

Fiber amplifier technology is to dope rare earth elements that can produce laser light into the core of the fiber, and amplify the passing optical signal through the DC optical excitation provided by the laser. The traditional optical fiber transmission system is to adopt optical-electric-optical regeneration repeater, this relay equipment affects the stability and reliability of the system, in order to remove the above-mentioned conversion process, directly amplify the signal transmission on the optical path, it is necessary to use an all-optical transmission repeater to replace this regeneration repeater. The applicable equipment is erbium-doped fiber amplifier (EDFA), praseodymium-doped fiber amplifier (PDFA), niobium-doped fiber amplifier (NDFA).

At present, EDFA is mainly used in optical amplification technology.

Set Value: The threshold value of the set amount of reflection.

Display value: The actual amount of reflection in the actual inspection.

When the display value exceeds the threshold value and is lower than the threshold value, the output signal of the fiber amplifier will be different.

Fiber optic heads are made up of two optical fibers, one emitting light and the other receiving the reflected light. And the strength of the reflected light is the amount of reflection.

Red is the actual received brightness value. Green is the threshold value (set value), as long as the red value is greater or less than the green value, there will be a signal output or signal disconnection. We are now using a Taiwan Daochuan amplifier, which is quite convenient to set up.

Fiber optic sensors are used as an extension of optical fiber amplifier optoelectronic components. According to different scanning functions, it can be divided into through-beam and diffuse reflection models. Fiber optic sensors with glass fiber optics and metal housings can be used in the high temperature range. High-quality acrylic fiber optic sensors are suitable for standard applications.

The transmitter and receiver of the fiber optic amplifier are housed in a single housing. Depending on the model, the transmitter emits infrared or red light. Fiber optic amplifiers do not have lenses because fiber optic sensors must be connected to it.

According to the description, this should be the middle part of the DIP switch above the Fiber Optic Amplifier:

That is, off-delay 40ms stands for "disconnection delay 40ms";

That is, time off stands for "delayed shutdown";

That is, on delay 40ms stands for "on-delay 40ms";

When it is used, it should be used in conjunction with the normally open and normally closed dial of the third part of the DIP switch.

Attached: DIP switch part 1: high-resolution mode, norm "normal mode", high-speed mode";

The third part of the DIP switch: LO "normally open", DO "normally closed";

Usually r s t is used to represent the line marking of three lines of three-phase 380. Maybe your three ammeters are there to measure the current of each phase of a three-phase power supply.

l.It means light on It means that the light reacts to the light and it is normally open When there is light to the receiving port, D is the dark light reaction that is normally closed When there is no light to the receiving port, the reaction time should be the reaction time.

From a structural point of view, the laser needs a resonator and a pump source, while the amplifier only needs to be pumped and does not need to be generated.

The laser is converted into a laser by pumping light, and then the laser is continuously amplified, and the amplifier needs to inject a signal laser in the early stage, and its role is to amplify the signal laser.

Fiber optic amplifiers and photoelectric switches are very different in their applications and play different roles.

The optical fiber amplifier does not need to go through complex processes such as photoelectric conversion, electro-optical conversion and signal regeneration, and can directly amplify the signal with full optical fiber, which has good "transparency", and is especially suitable for relay amplification of long-distance optical communication. In the optical fiber access network, it is necessary to use the optical fiber amplifier to increase the power of the optical signal to compensate for the optical loss caused by the optical distributor and increase the number of users, so as to reduce the construction cost of the user network.

The photoelectric switch converts the input current into an optical signal on the transmitter, and the receiver then detects the target object according to the intensity or presence of the received light. Photoelectric switches have been used in many fields such as crop level detection, liquid level control, product counting, width discrimination, speed detection, fixed-length shearing, hole identification, signal delay, automatic door sensing, color mark detection, punch and shearing machine, and safety protection. In addition, the concealment of infrared rays can also be used as a burglar guard in banks, warehouses, shops, offices, and other places where it is needed.

The optical fiber amplifier is mainly to amplify the optical signal, and the intuitive understanding is to enhance the optical power to achieve the purpose of longer distance transmission; The optical switch is mainly used to control the optical path, such as turning on and off a certain optical signal, or switching between different signal paths, and it does not have the function of signal enhancement.