DC isolator. MTL-5561
All MTL7700 series barriers are based on the same simple principle. Each channel contains two pulse stages of the zener diode test connected to the term or a determination resistance and “infallible”.
In the event of an electrical failure in the safe zone, the diodes limit the voltage that can reach the hazardous area and the resistance limits the current. A fuse protects diodes and the two stages of permanent safety voltage limitation if either of these stages fails.
MTL7787+ is certified “ia” for all zones and “IIC for all explosive atmospheres”.