Barrier is between a field device and energy-limited circuit between the control room equipment, used to control room of electric energy supply field instruments is limited to neither produce enough spark to detonate dangerous gases, it can not produce enough to detonate dangerous gases meter surface temperature, thereby eliminating the detonation source. Barriers must be considered when selecting the model and the type of field instrumentation to adapt, must be considered compatible with the intrinsic safety barrier instrumentation requirements and the formation of the present security system impedance matching problems.
Barrier effect: that is, the security holder, and some have called it the safety limit transducer, which is mainly used in the security system, has a significant role. It can be dangerous signal transfer, has its indispensable position in the relevant industry. Here we tell you about the product information about the barrier: the barrier is intrinsically safe circuit security interface that allows signals in the security zone and the danger zone is passed, and the guide signal transmission, usually installed in the security loop or non-intrinsically safe loop. The so-called safety system mainly refers to the installation in a safe place, connected between intrinsically safe and non-intrinsically safe electrical equipment equipment. Barriers to occupy a very important position in the present security system, its performance is very good. Because the barrier in the design is mainly between field devices and control room devices, so whether it is in the control room equipment in what kind of state, even in a fault condition, it can be guaranteed to pass out the signal is safe.
Isolated Barrier Barrier is the most common type, its design and production is able to meet the requirements of the safety system, although compared to say this barrier Zener safety barriers are more expensive, but its performance is very good, it is possible for the user to bring a lot of benefits.
Isolated Barrier due Isolated Barrier using limited pressure, current limiting, isolation and other measures to prevent the risk of not only energy from the terminals for access to dangerous site, improve intrinsically safe performance of the system, but also increases the immunity system capability, greatly improving the system's reliability. After 24VDC power supply via DC-AC-DC conversion circuit output modules require multiple voltages.