The KMD-5567 provides surge suppression for one or two pairs of low-voltage data signal lines with three-stage hybrid technology. The KMD-5567 addresses overvoltage transients with gas tubes and silicon avalanche components. In addition, sneak and fault currents are mitigated with resettable (Positive Temperature Coefficient) fuses. The PTCs increase resistance several orders of magnitude when over-currents exceed safe levels. A normal state resumes when over-currents are removed. The ability to self-restore in this manner significantly increases suppressor performance and survivability.
The KMD-5567 is a two-part unit consisting of the HPO-0066 suppressor module and the HPO-0067 terminal connector. If the suppressor is damaged because of a lightning strike, causing the protected circuit to open, simply replace the HPO-0066 suppressor module.
When properly installed and wired, the KMD-5567 can protect the digital communication circuitry from lightning damage. The KMD-5567 is installed at building exits and entrances to provide surge suppression for one or two pairs of data signal lines. In smoke control applications, one KMD-5567 is also required for the EIA-485 terminals of every controller and repeater.
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