Zener diode barriers
MZB series Zener diode barriers are designed to effectively
limit excess energy before it reaches a hazardous area. The barriers provide
convenient removable terminals within an extremely efficient and space-saving
design with channels as small as 6.3 mm wide. The barrier 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 Zener 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.