Closed surround makes can fiber interface equipment efficien
CAN optical fiber interface equipment can be divided into single model number and multi-model number, single-core model and dual-core model, one-fiber two-channel CAN model and two-fiber one-channel CAN model, etc. according to different division methods. The above attributes can be generated interactively, so you must determine all kinds of parameter attributes before choosing the relevant equipment. It is embarrassing to buy the wrong one. Can optical fiber interface devices generally have three connection methods, let's talk about the following:
1. The first connection method, that is, there are only two can fiber interface devices with one fiber and two CAN, that is, you can only connect me and me, this is the most basic connection method, simple operation but high application risk, If something goes wrong, it will easily collapse.
2. The second connection method is to directly connect a can optical interface device with two optical fibers and one CAN to two can optical interface devices with two optical fibers and one CAN. Of course, the total number of devices in this connection mode is three, and it does not mean that only three devices can be connected. This connection method is currently the most mainstream. Although the operation is more difficult, it can deal with more complicated relay projects. Note that this connection method is developed and not closed-loop connected.
3. The third connection method, which is the closed surround connection mentioned in our title, requires us to use only two optical fibers and one CAN optical fiber interface device, which are connected at the end to form a closed loop. In this case, even if there is a problem with the device or the line clockwise, the counterclockwise direction will allow us to work normally, and vice versa. Because it is a wrap-around connection, the number of our devices is required to be three or more, as shown in the following figure. By comparison, we can know that this connection method is the most scientific and safest, and is a more perfect CAN data method for fiber optic relay.
In order to meet everyone's demand for can optical fiber interface equipment, Shenyang Guangcheng Technology has also launched related can optical fiber interface equipment GCAN-208. Shenyang Guangcheng Technology GCAN-208 can optical fiber interface tool is integrated with 1 (or 2) standard optical fiber interface (single mode, multimode, SC, ST optional), 2 (or 1) standard CAN bus interface Industrial grade CAN bus to fiber converter.
GCAN-208 series module can convert CAN bus data into optical signal and transmit through optical fiber. By using GCAN-208 series modules in pairs, users can easily extend the communication distance of the CAN bus, effectively eliminate long-distance communication interference, and prevent the bus from being damaged by electromagnetic interference, ground ring interference, lightning strikes, etc. to the bus and equipment.
GCAN-208 series module can convert CAN bus data transparently and losslessly into optical signal, and then analyze the optical signal transparently and losslessly into CAN bus data. Guangcheng Technology uses a unique bus signal conversion technology, which can convert the conversion time between CAN data and optical signals to microseconds. This ensures the real-time communication, so GCAN-208 can support any CAN bus communication protocol. Such as: CANopen, SAEJ1939, DeviceNet, NMEA2000, etc.