Turck MZB series Zener diode barriers for hazardous areas

The MZB series Zener diode barriers are designed to limit excess energy before it reaches a hazardous area.

The devices provide removable terminals within a space-saving design - with channels as small as 6.3 mm wide - to consume minimal panel space. Additionally, the MZB series features a bussed power feed and offers both relay and solid-state switch models.

Each channel of the barriers is fitted with two stages of pulse-tested Zener diodes and an infallible terminating resistor. If an electrical fault such as an overvoltage occurs in the non-hazardous area of the barrier, the diodes limit the voltage available to hazardous-area circuits, while the series resistance limits the current. Within this circuit is a fuse designed to immediately and safely rupture if the excess energy continuously applied to the barrier exceeds the design criteria for the loop.