Before selecting the signal isolator, it is necessary to clarify the type of data signal transmitted by the system software, and the current flow or working voltage data signal can not be stronger than the limit current strength that the isolator can bear. The number of jacks is the same as the number of data signal output channels or the latter number is large. If there is no use of the jack can be immediately idle, to prevent the situation of misconnecting the route. Then pay attention to whether it is necessary to connect the external power supply and its switching power supply working voltage. In addition to the role, we must also pay attention to the quality and price of isolators, there are many levels of isolators on the market, as far as possible to choose cost-effective goods.

The key function of the signal isolator is to protect against electromagnetic interference, and its impact compressive strength is the key main parameter. In a variety of isolators, the type without external power supply saves electromagnetic energy and is convenient to install. The output power and noise size of the isolator also harm your choice. In the purchase of large manufacturers of goods as far as possible, not only to ensure after-sales service can also reduce the frequency of maintenance. Generally, the energy consumption of the multi-functional isolator will be larger, and in some cases, the role of the more visible suitable, the choice is still related to the actual situation.