Special Design for Dc Surge Protection Circuit - Network two-in-one lightning arrester – Leihao

Integrated conventional products are mostly used for ordinary twisted-pair signals below 2M (low-speed voltage signals or switching signals and perimeter alarm signals), verified conventional products are mostly used for analog signals or digital signals above 2M (high-speed voltage signals or switching signals and 485 protocol signals, etc.), and plug-in current loop products are mostly used for 4(0)-20mA current loop signals.
Basic content editing Signal lightning protector is a kind of surge protector, which is an important embodiment of internal protection. Today, with the rapid development of information technology, the application of signal lightning protection devices is becoming more and more common, and people attach great importance to it. There are many kinds of signal lightning arresters, and the products should be selected reasonably according to the corresponding requirements. The low-level data signal part of data signal lightning protection includes cable TV lightning arrester, twisted-pair transmission lightning arrester, communication signal line lightning arrester, satellite receiver antenna lightning arrester, host and service lightning arrester

(1) primary protection of signal Twisted pair signal protection (overvoltage protection plug) protects signal system and equipment. The rated voltage is 100VAC/DC, the maximum discharge current Ismax per line is 10 kA (8 ~ 20 μ s), and the response time is ≤10ns. For power lines and signal lines (analog and digital), for example, telephone equipment is 110 VAC/DC; The control and instrument lines and data lines are 12V DC /8V AC and 24V DC /15V AC, so signal lightning arrester AD/kz-24 should be installed.

(2) Signal secondary protection Serial port protector with plug-in selector with protection circuit is used to protect signal system and equipment, and can be used in high transmission occasions. For example, the host and server of the protection port are installed in front of the serial port. The rated voltage is 8V and 12V, the maximum discharge current Ismax is 15kA, and the data transmission rate is 1Mbit/s .. The rated voltage for fine protection is 12vdc, the rated discharge current is 100a (8 ~ 20μ s), and the data transmission rate is 1mbit/s. Coaxial cable signal protector is used to protect computer system using 75 Ω ~ 93 Ω interface. It is installed in front of thick and thin cable network cards. The maximum amplified current Ismax is 20 kA (8 ~ 20 μ s) and the data transmission rate is 16 Mbit/s. Overvoltage protector for broadcasting satellite antenna feeder (cable TV line) is used to protect the equipment of 75ω system, such as antenna amplifier and broadcasting satellite receiving system. The maximum discharge current Ismax is 3.5 ka (8 ~ 20 μ s) and the frequency range is 4 ~ 2050 MHz.