Optical modules in industrial Ethernet and substation communication networks are installed on the cabinet side all year round, and the environment is far harsher than the computer room. When selecting a model, you should think clearly about the temperature range, monitoring methods and electrical isolation at once, instead of copying the computer room list.
The temperature range is confirmed according to the installation position
In the industry, optical modules are usually divided into two grades: commercial and industrial. Commercial grade generally covers 0℃-70℃, and industrial grade can cover -40℃-85℃. In outdoor cabinets in the north in winter and in high-temperature workshops in summer, the cabinet temperature may approach the upper limit of the module. It is recommended that the temperature specifications be written into the technical agreement during the design stage, and the temperature ranges should be confirmed with EB-LINK on a model-by-model basis instead of defaulting based on experience. The actual measured temperature inside the cabinet is often higher than the ambient temperature.
DDM is your troubleshooting thermometer
- Read the TX optical power to determine whether the module itself is aging.
- Read RX optical power positioning. Optical path is bent and connectors are dirty.
- Combining temperature and supply voltage to distinguish abnormalities caused by power supply fluctuations
- Set over-limit alarms for important links, turning passive repairs into proactive prevention
Strong electromagnetic environment relies on optical fiber for isolation
The optical fiber itself is insulated. Using optical links to replace long-distance copper cables between devices can cut off the ground potential difference path.Optical isolation renovation of a 220kV substation communication networkIt's this idea. Cabinet side equipmentSFP Gigabit single mode dual fiber 10KM optical moduleConnect to the backbone optical fiber and cooperate withCommunication transformation plan for electric power and new energy stationsThe wiring specifications deal with surge protection and grounding, and similar ideas are also applicable to industrial networks with long distances along the line.
It is recommended that industrial projects conduct a link budget review before putting into operation and retain DDM baseline records. During the operation and maintenance phase, the baseline readings can be compared, and fault location can be compressed from the hour level to the minute level. Aging modules whose readings continue to decline should also be taken offline and replaced in a timely manner.